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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K

ý   ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2007

OR

o
 
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from N/A to N/A

Commission file number: 0-10961

QUIDEL CORPORATION
(Exact name of registrant as specified in its charter)

DELAWARE   94-2573850
(State or other jurisdiction of
incorporation or organization)		   (I.R.S. Employer
Identification No.)

10165 McKellar Court
San Diego, California
 
 
92121
(Address of principal executive offices)   (Zip Code)

858-552-1100
(Registrant's telephone number, including area code)

Not Applicable
(Former name, former address and former fiscal year, if changed since last report)

Securities registered pursuant to Section 12(b) of the Act: Common Stock, $0.001 par value, and accompanying Preferred Shares Purchase Rights

Securities registered pursuant to Section 12(g) of the Act: None

         Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes o No ý

         Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Exchange Act. Yes o No ý

         Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ý No o

         Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. o

         Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer," "accelerated filer," and "smaller reporting company" in Rule 12b-2 of the Exchange Act. (Check one):

Large accelerated filer o   Accelerated filer ý   Non-accelerated filer o
 (Do not check if a smaller reporting company)		   Smaller reporting company o

         Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No ý

         The aggregate market value of the registrant's common stock held by non-affiliates of the registrant was $498,616,112 based on the closing sale price at which the common stock was last sold, as of the last business day of the registrant's most recently completed second fiscal quarter.

         As of February 20, 2008, 32,727,204 shares of the registrant's common stock were outstanding.

DOCUMENTS INCORPORATED BY REFERENCE
(To the Extent Indicated Herein)

         Portions of the registrant's definitive proxy statement to be filed with the Securities and Exchange Commission in connection with the registrant's 2008 Annual Meeting of Stockholders (to be held on May 13, 2008) are incorporated by reference into Part III, Items 10, 11, 12, 13 and 14 of this Annual Report on Form 10-K.

A Warning About Forward-Looking Statements

        This Annual Report on Form 10-K contains forward-looking statements within the meaning of the federal securities laws that involve material risks, assumptions and uncertainties. Many possible events or factors could affect our future financial results and performance, such that our actual results and performance may differ materially. As such no forward-looking statement can be guaranteed. Differences in actual results and performance may arise as a result of a number of factors including, without limitation, seasonality, the timing of onset, the length and severity of cold and flu seasons, our ability to realize revenue from the delayed 2007-2008 flu season, uncertainty surrounding the detection of novel influenza viruses involving human specimens, adverse changes in the competitive and economic conditions in domestic and international markets, actions of our major distributors, technological changes and uncertainty with research and technology development, including any future molecular-based technology, the reimbursement system currently in place and future changes to that system, manufacturing and production delays or difficulties, adverse actions or delays in product reviews by the U.S. Food and Drug Administration (the "FDA"), intellectual property, product liability, environmental or other litigation, required patent license fee payments not currently reflected in our costs, potential inadequacy of booked reserves and possible impairment of goodwill, and lower-than-anticipated sales or market penetration of our new products. Forward-looking statements typically are identified by the use of terms such as "may," "will," "should," "might," "expect," "anticipate," "estimate," and similar words, although some forward-looking statements are expressed differently. The risks described under "Risk Factors" in Item 1A of this Annual Report and elsewhere herein and in reports and registration statements that we file with the Securities and Exchange Commission (the "SEC") from time to time should be carefully considered. You are cautioned not to place undue reliance on these forward-looking statements, which reflect management's analysis only as of the date of this Annual Report. The following should be read in conjunction with the audited Consolidated Financial Statements and notes thereto beginning on page F-1 of this Annual Report. We undertake no obligation to publicly release the results of any revision or update of these forward-looking statements.


Part I

Item 1.    Business

        All references to "we," "our," and "us" in this Annual Report refer to Quidel Corporation and its subsidiaries.

Overview

        We commenced our operations in 1979 and launched our first products, dipstick-based pregnancy tests, in 1984. Our product base and technology platforms have expanded through internal development and acquisitions of other products and technologies. We have a leadership position in the development, manufacturing and marketing of rapid diagnostic solutions at the professional point-of-care ("POC") in infectious diseases and reproductive and women's health. We focus on POC testing solutions specifically developed for the physician office lab ("POL") and acute care markets globally. We sell our products to professionals for use in physician offices, hospitals, clinical laboratories, retail clinics and wellness screening centers. Our POC testing solutions are designed to provide specialized results that meet two important value criteria that we have branded as Quidel Value Build™ ("QVB™"):

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        We market our POC products in the U.S. through a network of national and regional distributors, supported by a direct sales force. Internationally, we sell and market primarily in Japan and Europe by channeling products through distributor organizations and sales agents. In addition, in January 2008, we entered into an agreement with bioMerieux S.A. ("bioMerieux") to form a long-term global alliance in the area of rapid clinical diagnostics for the point-of-care. Starting in May 2008, bioMerieux will be the exclusive distributor of all our current rapid diagnostic tests in all regions with the exception of the U.S., Japan and Scandinavia.

        In addition to our rapid, POC diagnostic business, we also develop research products through our Specialty Products Group (the "SPG"), with an emphasis on potential future rapid test applications. The SPG is currently responsible for more than 100 of our clinical and research products used worldwide in reference laboratories and in research applications at leading universities and biotechnology companies. The SPG revenues, income and assets are less than 10% of our overall operations.

        We are a corporation, incorporated in the State of Delaware. Our executive offices are located at 10165 McKellar Court, San Diego, California 92121, and our telephone number is (858) 552-1100. This Annual Report and each of our other periodic and current reports, including any amendments thereto, are available, free of charge, on our website, www.quidel.com, as soon as reasonably practicable after such material is electronically filed with or furnished to the SEC. The information contained on our website is not incorporated by reference into this Annual Report and should not be considered part of this Annual Report. In addition, the SEC website contains reports, proxy and information statements, and other information about us at www.sec.gov.

Business Strategy

        We believe that the trend among healthcare providers to adopt POC testing continues to increase, and demographic changes, reimbursement policies, a shortage of skilled laboratory workers and the availability of clinically valuable tests will increase growth in this diagnostic category. More and more employers, health plans and payers are recognizing that POC testing is a cost-effective means for improving the quality of care and patient satisfaction. Continuous improvements in technologies are resulting in a growing number of new diagnostic tests that combine high levels of accuracy with rapid, easy-to-use product formats. It is our mission to further expand our significant leadership position in POC rapid diagnostics. In order to accomplish this mission, our strategy is to:

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Diagnostic Test Kit Industry Overview

The Overall Market for In Vitro Diagnostics

        The worldwide market for in vitro diagnostic, or IVD, products was estimated at approximately $28.0 billion in 2005, and is segmented by the particular test discipline. The largest market segments are immunodiagnostics testing and instrument-based clinical chemistry, which account for approximately 31% and 21% of the total IVD market, respectively. Geographically, in 2006, approximately 40% of total IVD revenues were generated in the U.S., while Europe and Asia accounted for approximately 37% and 18%, respectively.

        Customers for IVD products are primarily large centralized laboratories, independent reference laboratories or hospital-based facilities. In the U.S., these central laboratories account for approximately 75% of the revenues generated by IVD products.

        The centralized diagnostic testing process typically involves obtaining a specimen of blood, urine or other sample from the patient and sending the sample from the healthcare provider's office or hospital unit to a central laboratory. In a typical visit to the physician's office, after the patient's test specimen is collected, the patient is usually sent home and receives the results of the test several hours or days later. The result of this process is that the patient may leave the physician's office without confirmation of the diagnosis and the opportunity to begin more effective immediate care.

        Hospitals in the U.S. have progressively sought to reduce the length of patient stays and, consequently, the proportion of cases seen as outpatients has increased. If the U.S. experience is representative of future trends, emergency departments and other critical care units such as intensive care units, operating rooms, trauma and cardiac centers are increasingly becoming the principal centers for the management of moderate and severe acute illness. In the U.S., there are between 110 and 120 million emergency room visits annually.

        The over-the-counter market for IVD self-testing has not been materially affected by these trends. The worldwide over-the-counter market was estimated to grow to $4.8 billion by 2005. Two test categories, glucose monitoring for diabetes and pregnancy, currently dominate this market segment.

The Professional POC Market

        POC testing for certain diseases has become an accepted adjunct to central laboratory and self-testing. The professional POC market is comprised of two general segments: decentralized testing

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in non-institutional settings such as physicians' offices and hospital testing (emergency rooms and bedside). Hospital POC testing is accepted and growing and is generally an extension of the hospital's central laboratory.

        Out-of-hospital testing sites consist of physicians' office laboratories, nursing homes, pharmacies, retail clinics and other non-institutional, ambulatory settings in which healthcare providers perform diagnostic tests. This decentralized POC market encompasses a large variety of IVD products ranging from moderate-sized instrumented diagnostic systems serving larger group practices to single-use, disposable tests for smaller practice physicians' offices. We believe POC testing out-of-hospital is increasing due to its clinical benefit, cost-effectiveness and patient satisfaction.

        Total revenues from the rapid, non-instrument-based professional POC market were estimated at approximately $483 million in 2005 in the U.S. The growth in POC testing in the U.S. is in part due to evolving technological improvements creating high quality tests with laboratory accuracy and POC ease-of-use, which are capable of being granted a waiver under the Clinical Laboratory Improvement Amendments of 1988 ("CLIA"). A CLIA-waived test is defined as a simple laboratory test which employs methodologies that are so simple and accurate as to render the likelihood of erroneous results negligible and/or pose no reasonable risk of harm to the patient if the test is performed incorrectly. CLIA-waived tests may be used in physician office laboratories, as well as acute care, urgent care and hospital facilities. In 2006, an estimated 91,637, or 79%, of physician office laboratories had a CLIA waiver.

Products

        A majority of our total revenues relate to three product families. For the years ended December 31, 2007, 2006 and 2005, we derived approximately 81%, 82% and 78%, respectively, of our total revenues from sales of our influenza, Group A Strep and pregnancy tests. We expect that these three product families will continue to account for a substantial portion of our total revenues and any material reduction in supply, demand or pricing of these product families would have a material adverse effect on our business, operating results and financial condition.

        For the years ended December 31, 2007, 2006 and 2005, export sales to unaffiliated customers constituted approximately 14%, 20% and 25%, respectively, of total revenue. The export sales were primarily to customers in Japan and Europe. We expect that export sales will represent a growing portion of our total revenue in the foreseeable future.

        We provide rapid POC and other diagnostic tests under the following brand names: QuickVue®, QuickVue+®, QuickVue Advance® and Metra®. Our rapid POC diagnostic tests and our diagnostic and research markers participate in the following medical and wellness categories:

        Influenza.    Our influenza tests are rapid, qualitative tests for the detection of the viral antigens of influenza type A and B, the two most common types of the influenza virus. Our first influenza test received FDA clearance in September 1999, with commercialization beginning in December 1999. The FDA granted us the first CLIA waiver for an influenza test in October 2000. Our second generation test, the QuickVue® Influenza A+B test, which allows for the differential diagnosis of influenza type A and type B, received FDA clearance in September 2003 and a CLIA waiver in February 2004. In December 2005, we announced FDA clearance for several new claims for our QuickVue® Influenza A+B test, including 94% sensitivity for detecting type A influenza with nasal swabs versus culture and 90% specificity.

        Group A Strep.    Each year millions of people in the U.S. are tested for Group A Strep infections, commonly referred to as "strep throat." Group A Streptococci are bacteria that typically cause illnesses

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such as tonsillitis and pharyngitis which, if left untreated, can progress to secondary complications. Our initial Strep A test, the QuickVue In-line® Strep A test, was the first rapid Strep A test to be granted a CLIA waiver, and we launched additional product offerings with the QuickVue®+ Strep A and the QuickVue® Dipstick Strep A tests in 1996 and 2001, respectively. Our QuickVue® Strep A tests are intended for the rapid, qualitative detection of Group A Streptococcal antigen from throat swabs or confirmation of presumptive Group A Streptococcal colonies recovered from culture. The tests are to be used to aid in the diagnosis of Group A Streptococcal infection.

        RSV Test:    Our QuickVue® RSV test is a rapid immunoassay for Respiratory Syncitial Virus ("RSV"). The majority of upper respiratory tract infections in children are caused by viruses and RSV is generally recognized as a frequent agent responsible for these infections. We launched our RSV test during the fourth quarter of 2006, and we received CLIA waiver in February 2008.

        Pregnancy.    Our QuickVue® pregnancy tests are used in both the physicians office lab and the acute care settings. The early detection of pregnancy enables the physician and patient to institute proper care, helping to promote the health of both the woman and the developing embryo. Our QuickVue® pregnancy tests are sensitive immunoassay tests for the qualitative detection of human Chorionic Gonoadotropin ("hCG") in serum or urine for the early detection of pregnancy.

        Chlamydia.    Chlamydia trachomatis is responsible for the most widespread sexually transmitted disease in the U.S. Over one-half of infected women do not have symptoms and, if left untreated, Chlamydia trachomatis can cause sterility. Our QuickVue® Chlamydia test is a lateral flow immunoassay for the rapid, qualitative detection of Chlamydia from endocervical swab and cytology brush specimens. The test is intended for use as an aid in the presumptive diagnosis of Chlamydia.

        Bacterial Vaginosis.    Each year millions of women seek treatment of genital infections generally known as infectious vaginitis. One of the most common forms of infectious vaginitis is bacterial vaginosis ("BV"), a condition which, if left untreated, can lead to serious clinical complications, including pre-term births, pelvic inflammatory disease, infections following gynecological surgeries and an increased risk of contracting HIV. Our QuickVue® Advance G. Vaginalis test, launched in July 2002, is an enzyme activity test for use in the detection of Gardnerella vaginalis Proline IminoPeptidase ("PIP") activity in vaginal fluid specimens from patients suspected of having bacterial vaginosis.

        Immunoassay fecal occult blood ("iFOB").    Our QuickVue® iFOB test is a rapid, fecal immunochemical test ("FIT") intended to detect the presence of blood in stool specimens. Blood in the stool is an indication of a number of gastrointestinal disorders, including colorectal cancer. We launched our iFOB test in late December 2005.

        Helicobacter pylori ("H. pylori").    H. pylori is the bacterium associated with approximately 80% of patients diagnosed with peptic ulcers in the U.S. H. pylori is implicated in chronic gastritis and is recognized by the World Health Organization as a Class 1 carcinogen that may increase a person's risk of developing stomach cancer. Once an H. pylori infection is detected, antibiotic therapy is administered to eradicate the organism and effect a cure of the ulcer. Our rapid test is a serological test that measures antibodies circulating in the blood caused by the immune response to the H. pylori bacterium. Our initial test was the first rapid H. pylori test to be granted a CLIA waiver. We launched our second-generation CLIA-waived test, the QuickVue® H. Pylori gII™ test, in August 2000.

        Bone Health.    Osteoporosis is a systemic skeletal disease characterized by low bone mass and deterioration of the microarchitecture of bone tissue, with a consequent increase in bone fragility and susceptibility to fractures. The risk for fracture increases exponentially with age. A key set of

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parameters in the monitoring of osteoporosis, both before and after therapy, are biochemical markers of bone metabolism. As a leader in the field of bone markers, we produce both clinical and research products for the assessment of osteoporosis and the evaluation of bone resorbtion/formation, which, including our metabolic bone markers, are used by physicians to monitor the effectiveness of therapy in pharmaceutical and related research.

        We have other products which include veterinary products as well as clinical laboratory and research tests used in the measurement of circulating immune complexes, complement deficiencies and complement activation.

Seasonality

        Sales of our infectious disease products are subject to, and significantly affected by, the seasonal demands of the cold and flu seasons, prevalent during the fall and winter. As a result of these seasonal demands, we typically experience lower sales volume in the second and third quarters of the calendar year, and have higher sales in the first and fourth quarters of the calendar year. For the years ended December 31, 2007, 2006 and 2005, total revenue in the first and fourth quarters have combined for 61%, 62% and 62%, respectively. Historically, sales of our infectious disease products have varied from year to year based in large part on the severity, length and timing of the onset of the cold and flu season. For the years ended December 31, 2007, 2006 and 2005, sales of our infectious disease products accounted for 64%, 65% and 59%, respectively, of total revenue. Sales of our products vary from year to year and quarter to quarter, and can be influenced significantly if distributors attempt to time the onset of an early cold and flu season, or if they initiate larger orders in anticipation of a more severe cold and flu season. Our influenza products have a two-year shelf life, which may also lead a distributor to initiate its purchases earlier in the flu season. While we believe that the severity, length and timing of the onset of the cold and flu season will continue to impact sales of our infectious disease products, there can be no assurance that our future sales of these products will necessarily follow historical patterns.

Research and Development

        We continue to focus our research and development efforts on three areas: 1) new proprietary product platform development, 2) the creation of improved products and new products for existing markets, and 3) products developed under collaborations with other companies for new and existing markets. Our immunoassay development program is evaluating a variety of leading technology and product licensing opportunities from a number of academic research departments and other organizations.

        As part of our focus on Research to Rapids™, the SPG preferentially targets markers with potential downstream POC application in selected disease states. Several candidate tests have been developed on microwell platforms and are currently marketed and sold to clinicians and researchers. The SPG is strategically focused on developing clinical proof around these markers and demonstrating their utility in a variety of pathologies. We currently market and sell these products both directly and through select distributors throughout the world under our Quidel® and Metra® brands.

        Research and development expenses were approximately $12.9 million, $13.0 million and $12.8 million for the years ended December 31, 2007, 2006 and 2005, respectively. There were no significant customer-sponsored research activities during the years ended December 31, 2007, 2006 and 2005. During the second quarter of 2005, our joint development agreement with a third party was terminated and the remaining deferred revenue balance of $0.9 million was recognized as contract revenue during the second quarter of 2005. We anticipate that we will continue to devote a significant amount of financial resources to product and technology research and development for the foreseeable future.

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Marketing and Distribution

        We focus on ensuring market leadership and providing points of differentiation by specializing in the diagnosis and monitoring of selected disease states. In order to support our value proposition as a company that markets the highest quality products in support of better medical outcomes, we are highlighting our QVB™ efforts through the development of new innovations and the communication of new solutions in the field of rapid diagnostic testing. Our QVB™ program includes significant work in understanding the needs of the end-use customer, building products that meet those needs, providing proof studies to validate rapid diagnostic testing at the point-of-care, and leveraging the work of researchers and key opinion leaders studying our tests and technology to help enhance the health and well being of people around the globe. Our marketing strategy includes ensuring each of our key product portfolios is supported by economic and clinical validation that shows hospitals, laboratories, acute care facilities and POC clinicians that these tests deliver high quality results in a cost-effective manner.

        In contrast to the central laboratory market, the U.S. POC market is highly fragmented, with many small or medium-sized customers. We have designed our business strategy around serving the needs of this market segment. To reach these customers, a network of national and regional distributors is utilized and supported by our sales force. We have developed priority status with several of the major distributors in the U.S., resulting in many of our products being the preferred products offered by these distributors.

        Internationally, the use of professional rapid POC diagnostic tests, the acceptance of testing outside the central laboratory, the regulatory requirements to sell POC tests and consumer interest in over-the-counter and self-test products, differ considerably from the U.S. Our international sales are significantly lower than domestic sales, largely due to the POC market being more developed in the U.S. relative to the overall IVD market in other countries with the exception of influenza testing in the Japanese market. Our partnership with bioMerieux seeks to bring the POC testing, clinical and economic proof and quality of our brand to markets around the globe, enabling acceptance and expansion of POC testing through successful use of our QuickVue® product portfolio.

        During 2007, we continued to invest in several key areas: further validation of customer needs through voice of customer studies ("VOC"), expanding clinical research as part of our QVB™ program and expanding our communications through extensive advertising, direct mail, promotional campaigns and public relations. Our VOC emphasis enables us to better understand the customer's needs and requirements in both domestic and international markets in order to focus our product marketing and distribution partner plans. For example, annual post-season flu market research allows us to measure the success of our messaging to drive adoption as well as identify new product requirements for future application to the product line.

        The essential aspect of QVB™ is building awareness about our products and their performance through the clinical validation value criterion. During 2007, we conducted several clinical studies and/or sponsored others that have resulted in abstracts and posters, which included presentations at the Options VI Influenza International Meeting (Toronto), the Infectious Disease Society of America Annual Meeting (San Diego), the International Conference on Respiratory Infections (Hong Kong), the Clinical Virology Symposium (Clearwater) and at the American Academy of Pediatrics.

        We derive a significant portion of our total revenue from a relatively small number of distributors. Four of our distributors, which are considered to be among the market leaders, collectively accounted for approximately 52%, 59% and 63% of our total revenue for the years ended December 31, 2007, 2006 and 2005, respectively. Even though our distributor mix will likely change from period to period in the future, Cardinal Healthcare Corporation ("Cardinal"), DS Pharma Biomedical Co., Ltd ("DS Pharma") (formerly known as Sumitomo Seiyaku Biomedical Co., Ltd.), National Distribution Corporation ("NDC") and Physician Sales and Services Corporation ("PSS") have historically

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accounted for a significant portion of our total revenue. Our sales are affected by fluctuations in the buying patterns of these distributors and the corresponding changes in inventory levels maintained by them. Inventory levels held by these distributors may fluctuate significantly from quarter to quarter. We have limited visibility into or control over forces affecting changes in distributor inventory levels. If total revenue to our significant distributors were to decrease in any material amount in the future, our business, operating results and financial condition could be materially adversely affected.

        See Note 7. "Industry and Geographic Information" in the Notes to Consolidated Financial Statements included in this Annual Report.

Manufacturing

        We have manufacturing operations in San Diego, California and Santa Clara, California. The San Diego facility, our largest manufacturing operation, principally produces our lateral-flow, immunoassay products. The Santa Clara facility manufactures our microtiter plate products.

        The San Diego facility consists of laboratories devoted to tissue culture, cell culture, protein purification and immunochemistry and production areas dedicated to manufacturing and assembly. In the manufacturing process, biological and chemical supplies and equipment are used. Since the year 2000, the San Diego facility has operated under a Quality Management System certified to the International Organization for Standardization ("ISO") 9001 certification. During 2005, we became certified to the ISO 13485:2003 Regulatory Standard as required for medical device manufacturers distributing product within the European Union and other countries. Our facility in Santa Clara, California is also ISO 13485:2003 certified. Many of the lateral-flow and immunoassay products manufactured in our San Diego, California facility are packaged and shipped by a third party located in Southern California.

        We seek to conduct all of our manufacturing in compliance with the FDA Quality System Regulations ("QSR") (formerly Good Manufacturing Practices) governing the manufacture of medical devices. Our manufacturing facilities have been registered with the FDA and the Department of Health Services of the State of California (the "State FDA"), and have passed routine federal and state inspections confirming compliance with the QSR regulatory requirements.

        In certain instances, we rely on a single source or a limited group of suppliers for certain components and raw materials for our products. Although we seek to reduce our dependence on sole or limited source suppliers, if available or practicable, the partial or complete loss of these sources could have a material adverse effect on our results of operations and damage customer relationships, due to the complexity of the products they supply and the significant amount of time required to qualify new suppliers.

        The manufacture of medical diagnostic products is difficult, particularly with respect to the stability and consistency of complex biological components. Because of these complexities, manufacturing difficulties occasionally occur that delay the introduction or supply of products and result in unanticipated manufacturing costs.

Government Regulation

        The testing, manufacture and commercialization of our products are subject to regulation by numerous governmental authorities, principally the FDA and corresponding state and foreign regulatory agencies. Pursuant to the U.S. Federal Food, Drug, and Cosmetic Act and the regulations promulgated thereunder, the FDA regulates the preclinical and clinical testing, manufacture, labeling, distribution and promotion of medical devices. Noncompliance with applicable requirements can result in, among other matters, fines, injunctions, civil penalties, recall or seizure of products, total or partial suspension of production, failure of the FDA to grant premarket clearance or premarket approval for

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devices, withdrawal of marketing clearances or approvals and criminal prosecution. The FDA also has the authority to request a recall, repair, replacement or refund of the cost of any device manufactured or distributed in the U.S. if the device is deemed to be unsafe.

        In the U.S., devices are classified into one of three classes (Class I, II or III) on the basis of the controls deemed necessary by the FDA to reasonably ensure their safety and effectiveness. Class I and II devices are subject to general controls including, but not limited to, performance standards, premarket notification ("510(k)") and postmarket surveillance. Class III devices generally pose the highest risk to the patient and are typically subject to premarket approval to ensure their safety and effectiveness. Our current products are all Class I or II.

        Prior to commercialization in the U.S. market, manufacturers must obtain FDA clearance through a premarket notification or premarket approval process, which can be lengthy, expensive and uncertain. The FDA has been requiring more rigorous demonstration of product performance as part of the 510(k) process, including submission of extensive clinical data. It generally takes from three to six months to obtain clearance but may take longer. For example, the FDA may determine that additional information is needed before a clearance determination can be made, which could prevent or delay the introduction of new products into the market. A premarket approval application must be supported by valid scientific evidence to demonstrate the safety and effectiveness of the device, typically including the results of clinical investigations, bench tests and reference laboratory studies. In addition, modifications or enhancements for existing products that could significantly affect safety or effectiveness, or constitute a major change in the intended use of the device, will require new submissions to the FDA, and there can be no assurance that the FDA will grant approval.

        We may not be able to obtain the necessary regulatory premarket approvals or clearances for our products on a timely basis, if at all. Delays in receipt of or failure to receive such approvals or clearances, or failure to comply with existing or future regulatory requirements, would have a material adverse effect on our business, financial condition and results of operations.

        Any devices we manufacture or distribute pursuant to FDA clearance or approvals are subject to continuing regulation by the FDA and certain state agencies, including adherence to QSR's relating to testing, control, documentation and other quality assurance requirements. We must also comply with Medical Device Reporting ("MDR") requirements mandating reporting to the FDA of any incident in which a product may have caused or contributed to a death or serious injury, or in which a product malfunctioned and, if the malfunction were to recur, would be likely to cause or contribute to a death or serious injury. Labeling and promotional activities are also subject to scrutiny by the FDA and, in certain circumstances, by the Federal Trade Commission. Current FDA enforcement policy prohibits the marketing of approved medical devices for unapproved uses.

        We are subject to routine inspection by the FDA and other state agencies for compliance with applicable federal, state and local regulations. Changes in existing requirements or adoption of new requirements could have a material adverse effect on our business, financial condition and results of operations. We may also incur significant costs in complying with any applicable laws and regulations in the future, resulting in a material adverse effect on our business, financial condition and results of operations.

        Our research and development and manufacturing activities involve the controlled use of hazardous materials, including but not limited to biological materials and chemicals such as dimethyl sulfate, sodium nitrite, acetaldehyde, acrylamide, potassium bromate and radionuclides. Federal, state and local laws and regulations govern the use, manufacture, storage, handling and disposal of hazardous materials. These regulations include federal statutes popularly known as CERCLA, RCRA and the Clean Water Act. Compliance with these laws and regulations is expensive. If any governmental authorities were to impose new environmental regulations requiring compliance in addition to that required by existing regulations, these future environmental regulations could impose substantial costs

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on our business. In addition, because of the nature of the penalties provided for in some of these environmental regulations, we could be required to pay substantial fines, penalties or damages in the event of noncompliance with environmental laws or the exposure of individuals to hazardous materials. Any environmental violation or remediation requirement could also partially or completely shut down our research and manufacturing facilities and operations, which would have a material adverse effect on our business.

        For marketing outside the U.S., we are subject to foreign regulatory requirements governing human clinical testing and marketing approval for our products. These requirements vary by jurisdiction, differ from those in the U.S., and may require us to perform additional preclinical or clinical testing regardless of whether FDA approval has been obtained. The amount of time required to obtain necessary approvals may be longer or shorter than that required for FDA approval. In many foreign countries, pricing and reimbursement approvals are also required.

        Our initial focus for obtaining marketing approval outside the U.S. is typically the European Union (the "EU") and Japan. EU Regulations and Directives generally classify health care products either as medicinal products, medical devices or in vitro diagnostics. The European Conformity ("CE") mark certification requires us to receive ISO certification for the manufacture of our products. This certification comes only after the development of an all-inclusive quality system, which is reviewed for compliance with ISO standards by a licensed body working within the EU. After certification is received, a technical file is developed which attests to the product's compliance with EU directive 98/79/EC for in vitro diagnostic medical devices. Only after this point is the product CE marked. The Japanese regulations require registration of in vitro diagnostic products with the Japanese Ministry of Health, Labor and Welfare. Additional clinical trials are typically required for registration purposes. For products marketed in Canada, we have our independent party certification under the Canadian Medical Device Regulation.

Intellectual Property

        The healthcare industry has traditionally placed considerable importance on obtaining and maintaining patent and trade secret protection for commercially relevant technologies, products and processes. We and other companies engaged in research and development of new diagnostic products actively pursue patents for technologies that are considered novel and patentable. However, important factors, many of which are not within our control, can affect whether and to what extent patent protection in the U.S. and in other important markets worldwide is obtained. By way of example, the speed, accuracy and consistency in application of the law in a patent office within any particular jurisdiction is beyond our control and can be unpredictable. The resolution of issues such as these and their effect upon our long-term success is likewise indeterminable. We have issued patents, both in the U.S. and internationally, with expiration dates ranging from the present through approximately 2024 and have patent applications pending throughout the world.

        It has been our policy to file for patent protection in the U.S. and other countries with significant markets, such as Western European countries and Japan, if the economics are deemed to justify such filing and our patent counsel determines that relevant patent protection may be obtained. No assurance can be given that patents will be issued to us pursuant to our patent applications in the U.S. or abroad or that our patent portfolio will provide us with a meaningful level of commercial protection.

        A large number of individuals and commercial enterprises seek patent protection for technologies, products and processes in fields in or related to our areas of product development. To the extent such efforts are successful, we may be required to obtain licenses and pay significant royalties in order to

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exploit certain of our product strategies and avoid a material adverse effect on our business. Licenses may not be available to us at all or, if so available, may not be available on acceptable terms.

        We are aware of certain patents issued to various developers of diagnostic products with potential applicability to our diagnostic technology. We have licensed certain rights from certain companies to assist with the manufacturing of certain products. In the future, we expect we will require or desire additional licenses from other parties in order to refine our products further and to allow us to develop, manufacture and market commercially viable or superior products effectively. There can be no assurance that such licenses will be obtainable on commercially reasonable terms, if at all, that any patents underlying such licenses will be valid and enforceable, or that the proprietary nature of any patented technology underlying such licenses will remain proprietary.

        We seek to protect our trade secrets and technology by entering into confidentiality agreements with employees and third parties (such as potential licensees, customers, strategic partners and consultants). In addition, we have implemented certain security measures in our laboratories and offices. Despite such efforts, no assurance can be given that the confidentiality of our proprietary information can be maintained. Also, to the extent that consultants or contracting parties apply technical or scientific information independently developed by them to our projects, disputes may arise as to the proprietary rights to such data.

        Under many of our distribution agreements, we have agreed to indemnify the distributors against costs and liabilities arising out of any patent infringement claims and other intellectual property claims asserted by a third party relating to products sold under those agreements.

Competition

        Competition in the development and marketing of diagnostic products is intense, and diagnostic technologies have been subject to rapid change. We believe that some of the most significant competitive factors in the rapid diagnostic market include convenience, price and product performance as well as the distribution, advertising, promotion and brand name recognition of the marketer. Our success will depend on our ability to remain abreast of technological advances, to introduce technologically advanced products, to effectively market our differentiated value products, to maintain our brand strength and to attract and retain experienced personnel, who are in great demand. The majority of diagnostic tests requested by physicians and other healthcare providers are performed by independent clinical reference laboratories. We expect that these laboratories will continue to compete vigorously to maintain their dominance of the testing market. In order to achieve market acceptance for our products, we will be required to demonstrate that our products provide physicians cost-effective and time-saving alternatives to tests performed in the clinical reference laboratory. This requires that physicians change the way that they are used to handling diagnostic testing.

        There has been a trend toward industry consolidation in our markets over the last few years. We may not be able to compete successfully in an increasingly consolidated industry and cannot predict with certainty how industry consolidation will affect our competitors or us. We expect this trend toward industry consolidation may continue as companies attempt to strengthen or hold their market positions in an evolving industry and as companies are acquired or are unable to continue operations. Many of our current and prospective competitors, including several large pharmaceutical and diversified healthcare companies, have substantially greater financial, marketing and other resources than we have. These competitors include, among others, Inverness Medical Innovations, Inc. ("IMA"), Beckman Coulter Primary Care Diagnostics ("Beckman"), Fisher Scientific Corporation ("Fisher"), Genzyme Diagnostics Corporation ("Genzyme"), and Becton Dickinson and Company ("Becton"). Our competitors may succeed in developing or marketing technologies or products that are more effective or commercially attractive than our current or future products or that would render our technologies and products obsolete. Moreover, we may not have the financial resources, technical expertise or

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marketing, distribution or support capabilities to compete successfully in the future. In addition, many competitors have made substantial investments in competing technologies that may be more effective than our technologies, or that may prevent, limit or interfere with our ability to make, use or sell our products either in the U.S. or in international markets.

Human Resources

        As of December 31, 2007, we had 278 employees, none of whom are represented by a labor union. We have experienced no work stoppages and believe that our employee relations are good.

Executive Officers of Quidel Corporation

        The names, ages and positions of all executive officers as of December 31, 2007 are listed below, followed by a brief account of their business experience during the past five years or more. Officers are normally appointed annually by the Board of Directors at a meeting of the Board of Directors. There are no family relationships among these officers, nor any arrangements or understandings between any officer and any other person pursuant to which an officer was selected. None of these officers has been involved in any court or administrative proceeding within the past five years adversely reflecting on the officer's ability or integrity.

        Caren L. Mason, 54, became our President and Chief Executive Officer on August 20, 2004. She has more than 25 years experience in healthcare. Prior to joining us, Ms. Mason provided consultative services for Eastman Kodak Health Imaging as a result of the sale of MiraMedica, Inc., a digital technology, diagnostic imaging company, to Eastman Kodak. She served as President and CEO for MiraMedica, Inc. from April 2002 through September 2003. From January 2000 through June 2001, Ms. Mason served as CEO of eMed Technologies, Inc. of Lexington, Massachusetts, a digital technology, diagnostic imaging company. Prior to joining eMed Technologies, Ms. Mason served as General Manager of the Women's Healthcare business and as a General Manager in various capacities for the Services business of General Electric Medical Systems from July 1996 to January 2000. Ms. Mason's additional healthcare experience includes her tenure with Bayer AG/AGFA from October 1989 to July 1996 where she last served as Senior Vice President for the AGFA Technical Imaging Business Group. Ms. Mason began her career in healthcare with American Hospital Supply/Baxter Healthcare and served in sales, marketing and managerial roles from 1977 through 1988. Ms. Mason is a graduate of Indiana University. She has been a member of the Franciscan Sisters of the Poor Foundation Board of Governors and has also been a member of the Board of Directors for MediServ/GESCI, eMed Technologies, Inc. and MiraMedica, Inc., and currently serves as a member of the Board of Directors of AdvaMed.

        John M. Radak, 47, became our Chief Financial Officer on February 1, 2007. Prior to joining us, Mr. Radak was Vice President of Finance and Chief Accounting Officer for Invitrogen Corporation, a leading provider of research tools for the life science industry, since January 2003. From August 2001 to January 2003, Mr. Radak was an independent consultant for various companies. Mr. Radak also served as Vice President of Finance and Corporate Controller for Sunrise Medical Inc. from December 1994 to August 2001. Mr. Radak received his B.A. in Business Administration from California State University, Fullerton and is a Certified Public Accountant.

        Richard C. Tarbox, 56, became our Senior Vice President, Corporate Development Officer on July 16, 2007. Prior to joining us, Mr. Tarbox served as Vice President, Strategic Sourcing & Business Development for the Healthcare Market Division of Thermo Fisher Scientific Incorporated, a company focused on meeting diagnostic testing needs in healthcare facilities, since 2004. Prior to Thermo Fisher Scientific and from 1995 to 2003, Mr. Tarbox served as managing partner and founder of The Tarbox Group, L.P., providing management consulting services and investigation and evaluation of private equity investment opportunities. From 1992 to 1995, Mr. Tarbox served as Executive Vice President and

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Chief Operating Officer of Ostex International, Inc., a developer and manufacturer of diagnostic products for osteoporosis and other bone health diseases. In addition, from 1981 to 1992, Mr. Tarbox held various senior business development, sales and operations positions with American Hospital Supply Corp/Baxter International, Inc., a global medical products and services company. Mr. Tarbox is a graduate of the University of Washington where he received his Bachelor's Degree in Clinical Psychology and the Kellogg School of Management at Northwestern University where he earned a Master's in Business Management.

        Thomas J. Foley, Ph.D., 68, has been our Chief Technology Officer since November 2004. Dr. Foley was Senior Vice President of Research and Development and Regulatory Affairs at Lifepoint Inc., a clinical diagnostics company, from 1998 to 2004. Prior to 1998, he was Executive Vice President of Research and Development with HiChem/Elan Diagnostics from 1994 to 1997. From 1987 to 1994, Dr. Foley was Vice President of Research and Development at Hycor Biomedical, Inc., a company involved in developing reagents and controls for urinalysis, therapeutic drug monitoring and allergy and autoimmune disease states. Dr. Foley was Vice President of Research and Development at Gilford Instruments from 1983 to 1986 and Worthington Diagnostics from 1981 to 1983. In addition, Dr. Foley was Manager of Research and Development at Beckman Instruments from 1979 to 1981. Dr. Foley has a Bachelor of Science and a Ph.D. in Biochemistry from Trinity College, Dublin.

        Robert J. Bujarski, J.D., 39, has been our Senior Vice President, General Counsel and Corporate Secretary since March 2007. From July 2005 to March 2007, he was our General Counsel and Vice President. Mr. Bujarski was an associate attorney with the law firm of Gibson, Dunn & Crutcher LLP in its transactions practice group from October 2001 to July 2005. Mr. Bujarski received his B.A. degree in 1991 and his law degree in 2001 from the University of Arizona.

        Scot M. McLeod, 43, has been our Senior Vice President, Operations since July 2, 2007. Mr. McLeod previously served as the Company's Vice-President, Operations since 2001. Mr. McLeod first joined the Company in 1997 as Director of Production and has held various management operations positions with the Company throughout his ten years of service. Mr. McLeod has over 20 years experience in operations, and a diverse manufacturing background in both domestic and international environments. Mr. McLeod spent five years in OUS/overseas manufacturing of computer peripherals. Prior to joining Quidel, Mr. McLeod held various positions in operations and quality with Medtronic Interventional Vascular, Hybritech Inc., ALCOA and Information Magnetics Corporation. Mr. McLeod has his B.S. in Chemical Engineering from the University of New Hampshire.

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Item 1A.    Risk Factors

Risks Related to Our Business

Our operating results may fluctuate adversely as a result of many factors that are outside our control.

        Fluctuations in our operating results, for any reason, could cause our growth or operating results to fall below the expectations of investors and securities analysts. For the year ended December 31, 2007, total revenue increased 11% to $118.1 million from $106.0 million for the year ended December 31, 2006. For further discussion of this increase, refer to Item 7. "Management's Discussion and Analysis of Financial Condition and Results of Operation" included in this Annual Report.

        Our sales estimates for future periods are based on estimated end-user demand for our products. Sales to our distribution partners would fall short of expectations if distributor inventories increase because of less than estimated end-user consumption.

        Other factors that are beyond our control and that could affect our operating results in the future include:

To remain competitive, we must continue to develop or obtain proprietary technology rights; otherwise, other companies may increase their market share by selling technologically superior products that compete with our products.

        Our competitive position is heavily dependent on obtaining and protecting our own proprietary technology or obtaining licenses from others. Our ability to compete successfully in the diagnostic market depends on continued development and introduction of new proprietary technology and the improvement of existing technology. If we cannot continue to obtain and protect proprietary technology, our total

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revenue and gross profits could be adversely affected. Moreover, our current and future licenses may not be adequate for the operation of our business.

        Our ability to obtain patents and licenses, and their benefits, is uncertain. We have issued patents both in the U.S. and internationally, with expiration dates ranging from the present through approximately 2024. Additionally, we have patent applications pending throughout the world. These pending patent applications may not result in the issuance of any patents, or if issued, may not have priority over others' applications or may not offer protection against competitors with similar technology. Moreover, any patents issued to us may be challenged, invalidated or circumvented in the future. In addition to the U.S., we have patents issued in various other countries including, for example, Australia, Canada, Japan and various European countries including France, Germany, Italy, Spain and the United Kingdom. Third parties can make, use and sell products covered by our patents in any country in which we do not have patent protection. We also license the right to use our products to our customers under label licenses that are for research purposes only. These licenses could be contested and, because we cannot monitor all potential unauthorized uses of our products around the world, we might not be aware of an unauthorized use and might not be able to enforce the license restrictions in a cost-effective manner. Also, we may not be able to obtain licenses for technology patented by others and required to produce our products on commercially reasonable terms.

In order to remain competitive and profitable, we must expend considerable resources to research new technologies and products and develop new markets. Our failure to successfully introduce new technologies and products and develop new markets could have a material adverse effect on our business and prospects.

        We devote a significant amount of financial resources to researching and developing new technologies, new products and new markets. The development, manufacture and sale of diagnostic products require a significant investment of resources. Moreover, no assurances can be given that our efforts to develop new technologies or products will be successful or commercially viable, including, without limitation, our strategic efforts relating to: (i) our next generation immunochemical fecal occult blood test, (ii) developing and expanding our molecular diagnostics research and development capabilities, (iii) identifying and commercializing new or higher value lateral flow products, and (iv) identifying and commercializing new markers and products in bone health.

        The development of new markets also requires a substantial investment of resources, such as new employees, offices and manufacturing facilities. Accordingly, we are likely to incur increased operating expenses as a result of our increased investment in sales and marketing activities, manufacturing scale-up and new product development associated with our efforts to:

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        As a result of any number of risk factors identified in this Annual Report, no assurance can be given that we will be successful in implementing our operational, growth and other strategic efforts. In addition, the funds for the foregoing projects have in the past come primarily from our business operations and a working capital line of credit. If our business slows and we become less profitable, and as a result have less money available to fund research and development, we will have to decide at that time which programs to cut, and by how much. Similarly, if adequate financial, personnel, equipment or other resources are not available, we may be required to delay or scale back our strategic efforts. Our operations will be adversely affected if our total revenue and gross profits do not correspondingly increase or if our technology, product and market development efforts are unsuccessful or delayed. Furthermore, our failure to successfully introduce new products and develop new markets could have a material adverse effect on our business and prospects.

We rely on a limited number of key distributors which account for a substantial majority of our total revenue. The loss of any key distributor or an unsuccessful effort to directly distribute our products could lead to reduced sales.

        Although we have many distributor relationships in the U.S., the market is dominated by a small group of these distributors. Four of our distributors, which are considered to be among the market leaders, collectively accounted for approximately 52%, 59% and 63% of our total revenue for the years ended December 31, 2007, 2006 and 2005, respectively. Even though our distributor mix will likely change from period to period in the future, Cardinal, DS Pharma, NDC and PSS have historically accounted for a significant portion of our total revenue. In addition, we rely on a few key distributors for a majority of our international sales, and will continue to do so for the foreseeable future, including our recently announced agreement in January 2008 with bioMerieux. The loss or termination of our relationship with any of these key distributors could significantly disrupt our business unless suitable alternatives were timely found or lost sales to one distributor are absorbed by another distributor. Finding a suitable alternative may pose challenges in our industry's competitive environment, and another suitable distributor may not be found on satisfactory terms. For instance, some distributors already have exclusive arrangements with our competitors, and others do not have the same level of penetration into our target markets as our existing distributors. If total revenue to these or any of our other significant distributors were to decrease in any material amount in the future or we are not successful in timely transitioning business to new distributors, our business, operating results and financial condition could be materially and adversely affected.

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Intellectual property risks and third-party claims of infringement, misappropriation of proprietary rights or other claims against us could adversely affect our ability to market our products, require us to redesign our products or seek licenses from third parties, and materially adversely affect our operating results. In addition, the defense of such claims could result in significant costs and divert the attention of our management and other key employees.

        Companies in or related to our industry often aggressively protect and pursue their intellectual property rights. There are often intellectual property risks associated with developing and producing new products and entering new markets, and we may not be able to obtain, at reasonable cost and upon commercially reasonable terms, licenses to intellectual property of others that is alleged to be part of such new or existing products. From time to time, we have received, and may continue to receive, notices that claim we have infringed upon, misappropriated or misused other parties' proprietary rights.

        Moreover, in the past we have been engaged in litigation with parties that claim, among other matters, that we infringed their patents. We or our customers may be sued by other parties that claim that our products have infringed their patents or misappropriated their proprietary rights or which may seek to invalidate one or more of our patents. An adverse determination in any of these types of disputes could prevent us from manufacturing or selling some of our products, limit or restrict the type of work that employees involved in such litigation may perform for us, increase our costs of revenue and expose us to significant liability.

        As a general matter, our involvement in litigation or in any claims to determine proprietary rights, as may arise from time to time, could materially and adversely affect our business, financial condition and results of operations for reasons such as:

        In addition to the foregoing, we may also indemnify some customers, distributors and strategic partners under our agreements with such parties if a third party alleges or if a court finds that our products or activities have infringed upon, misappropriated or misused another party's proprietary rights. Further, our products may contain technology provided to us by other parties such as contractors, suppliers or customers. We may have little or no ability to determine in advance whether such technology infringes the intellectual property rights of a third party. Our contractors, suppliers and licensors may not be required or financially able to indemnify us in the event that a claim of

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infringement is asserted against us, or they may be required to indemnify us only up to a maximum amount, above which we would be responsible for any further costs or damages.

We may not achieve market acceptance of our products among physicians and other healthcare providers, and this would have a negative effect on future sales growth.

        A large part of our business is based on the sale of rapid POC diagnostic tests that physicians and other healthcare providers can administer in their own facilities without sending samples to central laboratories. Clinical reference laboratories and hospital-based laboratories are significant competitors of ours and provide a majority of the diagnostic tests used by physicians and other healthcare providers. Our future sales depend on, among other matters, capture of sales from these laboratories by achieving market acceptance of POC testing from physicians and other healthcare providers. If we do not capture sales at the levels we have budgeted for, our total revenue will not grow as much as we hope and the costs we have incurred will be disproportionate to our sales levels. We expect that clinical reference and hospital-based laboratories will continue to compete vigorously against our POC diagnostic products in order to maintain and expand their existing dominance of the overall diagnostic testing market. Moreover, even if we can demonstrate that our products are more cost-effective or save time, physicians and other healthcare providers may resist changing to POC tests. Our failure to achieve market acceptance from physicians and healthcare providers with respect to the use of our POC diagnostic products would have a negative effect on our future sales growth.

Intense competition with other manufacturers of POC diagnostic products may reduce our sales.

        In addition to competition from laboratories, our POC diagnostic tests compete with similar products made by our competitors. There are a large number of multinational and regional competitors making investments in competing technologies and products, including several large pharmaceutical and diversified healthcare companies. We also face competition from our distributors since some have created, and others may decide to create, their own products to compete with ours. A number of our competitors have a potential competitive advantage because they have substantially greater financial, technical, research and other resources, and larger, more established marketing, sales, distribution and service organizations than we have. These competitors include, among others, IMA, Beckman, Fisher, Genzyme and Becton. Moreover, some competitors offer broader product lines and have greater name recognition than we have. If our competitors' products are more effective than ours or acquire market share from our products through more effective marketing or competitive pricing, our total revenue and profits could be materially and adversely affected. Competition also has the effect of limiting the prices we can charge for our products.

Our products are highly regulated by various governmental agencies. Any changes to the existing laws and regulations may adversely impact our ability to manufacture and market our products.

        The testing, manufacture and sale of our products are subject to regulation by numerous governmental authorities in the U.S., principally the FDA and corresponding state and foreign regulatory agencies. The FDA regulates most of our products, which are currently all Class I or II devices. The U.S. Department of Agriculture regulates our veterinary products. Our future performance depends on, among other matters, our estimates as to when and at what cost we will receive regulatory approval for new products. In addition, certain of our foreign product registrations are owned or controlled by our international distribution partners that could result in the loss of or delay in transfer of any such product registrations, thereby interrupting our ability to sell our products in those markets. Regulatory approval can be a lengthy, expensive and uncertain process, making the timing and costs of approvals difficult to predict. Our total revenue would be negatively affected by failures or delays in the receipt of, approvals or clearances, the loss of previously received approvals or clearances or the placement of limits on the marketing and use of our products.

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        Furthermore, in the ordinary course of business, we must frequently make subjective judgments with respect to compliance with applicable laws and regulations. If regulators subsequently disagree with the manner in which we have sought to comply with these regulations, we could be subjected to substantial civil and criminal penalties, as well as product recall, seizure or injunction with respect to the sale of our products. The assessment of any civil and criminal penalties against us could severely impair our reputation within the industry and any limitation on our ability to manufacture and market our products could have a material adverse effect on our business.

We are subject to numerous government regulations in addition to FDA regulation, and compliance with changes could increase our costs.

        In addition to FDA and other regulations described previously, numerous laws relating to such matters as safe working conditions, manufacturing practices, environmental protection, fire hazard control and disposal of hazardous or potentially hazardous substances impact our business operations. If these laws change or laws regulating any of our businesses are added, the costs of compliance with these laws could substantially increase. Compliance with any future modifications of these laws or laws regulating the manufacture and marketing of our products could result in substantial costs and loss of sales or customers. Because of the number and extent of the laws and regulations affecting our industry, and the number of governmental agencies whose actions could affect our operations, it is impossible to reliably predict the full nature and impact of future legislation or regulatory developments relating to our industry. To the extent the costs and procedures associated with meeting new requirements are substantial, our business and results of operations could be adversely affected.

We use hazardous materials in our business that may result in unexpected and substantial claims against us relating to handling, storage or disposal.

        Our research and development and manufacturing activities involve the controlled use of hazardous materials, including but not limited to chemicals and biological materials such as dimethyl sulfate, sodium nitrite, acetaldehyde, acrylamide, potassium bromate and radionuclides. Federal, state and local laws and regulations govern the use, manufacture, storage, handling and disposal of hazardous materials. These regulations include federal statutes popularly known as CERCLA, RCRA and the Clean Water Act. Compliance with these laws and regulations is already expensive. If any governmental authorities were to impose new environmental regulations requiring compliance in addition to that required by existing regulations, these future environmental regulations could impair our research, development or production efforts by imposing additional, and possibly substantial, costs on our business. In addition, because of the nature of the penalties provided for in some of these environmental regulations, we could be required to pay sizeable fines, penalties or damages in the event of noncompliance with environmental laws. Any environmental violation or remediation requirement could also partially or completely shut down our research and manufacturing facilities and operations, which would have a material adverse effect on our business. The risk of accidental contamination or injury from these hazardous materials cannot be completely eliminated and exposure of individuals to these materials could result in substantial fines, penalties or damages that are not covered by insurance.

Our total revenue could be affected by third-party reimbursement policies and potential cost constraints.

        The end-users of our products are primarily physicians and other healthcare providers. Use of our products would be adversely impacted if physicians do not receive adequate reimbursement for the cost of our products by their patients' healthcare insurers or payers. Our total revenue could also be adversely affected by changes or trends in reimbursement policies of these governmental or private healthcare payers. In the U.S., healthcare providers such as hospitals and physicians who purchase diagnostic products generally rely on third-party payers, principally private health insurance plans,

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federal Medicare and state Medicaid, to reimburse all or part of the cost of the procedure. We believe that the overall escalating cost of medical products and services has led to, and will continue to lead to, increased pressures on the healthcare industry, both foreign and domestic, to reduce the cost of products and services. Given the efforts to control and reduce healthcare costs in the U.S. in recent years, currently available levels of reimbursement may not continue to be available in the future for our existing products or products under development. Third-party reimbursement and coverage may not be available or adequate in either U.S. or foreign markets, current reimbursement amounts may be decreased in the future and future legislation, regulation or reimbursement policies of third-party payers may reduce the demand for our products or adversely impact our ability to sell our products on a profitable basis.

Unexpected increases in, or inability to meet, current demand for our products could require us to spend considerable resources to meet the demand or harm our customer relationships if we are unable to meet demand.

        If we experience unexpected increases in the demand for our products, we may be required to expend additional capital resources to meet these demands. These capital resources could involve the cost of new machinery or even the cost of new manufacturing facilities. This would increase our capital costs, which could adversely affect our earnings and cash resources. If we are unable to develop necessary manufacturing capabilities in a timely manner, our total revenue could be adversely affected. Failure to cost-effectively increase production volumes, if required, or lower than anticipated yields or production problems encountered as a result of changes that we may make in our manufacturing processes to meet increased demand or changes in applicable laws and regulations, could result in shipment delays as well as increased manufacturing costs, which could also have a material adverse effect on our total revenue and profitability.

        Unexpected increases in demand for our products could also require us to obtain additional raw materials in order to manufacture products to meet the demand. Some raw materials require significant ordering lead time and some are currently obtained from a sole supplier or a limited group of suppliers. We have long-term supply agreements with many of these suppliers, but these long-term agreements involve risks for us, such as our potential inability to obtain an adequate supply of raw materials and components and our reduced control over pricing, quality and timely delivery. It is also possible that one or more of these suppliers may become unwilling or unable to deliver materials to us. Any shortfall in our supply of raw materials and components, and our inability to quickly and cost-effectively obtain alternative sources for this supply, could have a material adverse effect on our total revenue or cost of sales and related profits.

        Our inability to meet customer demand for our products, whether as a result of manufacturing problems or supply shortfalls, could harm our customer relationships and impair our reputation within the industry. This, in turn, could have a material adverse effect on our business.

If one or more of our products proves to be defective, we could be subject to claims of liability that could adversely affect our business.

        A defect in the design or manufacture of our products could have a material adverse effect on our reputation in the industry and subject us to claims of liability for injuries and otherwise. Any substantial underinsured loss resulting from such a claim would have a material adverse effect on our profitability and the damage to our reputation in the industry could have a material adverse effect on our business.

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We are exposed to business risk which, if not covered by insurance, could have an adverse effect on our profits.

        Claims may be made against us for types of damages, or for amounts of damages, that are not covered by our insurance. For example, although we currently carry product liability insurance for liability losses, there is a risk that product liability or other claims may exceed the amount of our insurance coverage or may be excluded from coverage under the terms of our policy. Also, if we are held liable, our existing insurance may not be renewed at the same cost and level of coverage as currently in effect, or may not be renewed at all. Further, we do not currently have insurance against many environmental risks we confront in our business. If we are held liable for a claim against which we are not insured or for damages exceeding the limits of our insurance coverage, whether arising out of product liability matters or from some other matter, that claim could have a material adverse effect on our results of operations and profitability.

If we are not able to manage our growth strategy or if we experience difficulties integrating companies or technologies we may acquire after the acquisition, our earnings may be adversely affected.

        Our business strategy contemplates further growth in the scope of operating and financial systems and the geographical area of our operations, including further expansion outside the U.S., as new products are developed and commercialized or new geographical markets are entered. We may experience difficulties integrating the operations of companies or technologies that we may acquire with our own operations, and as a result we may not realize our anticipated benefits and cost savings within our expected time frame, or at all. Because we have a relatively small executive staff, future growth may also divert management's attention from other aspects of our business, and will place a strain on existing management and our operational, financial and management information systems. Furthermore, we may expand into markets in which we have less experience or incur higher costs. Should we encounter difficulties in managing these tasks, our growth strategy may suffer and our total revenue and gross profits could be adversely affected.

Our business could be negatively affected by the loss of or the inability to hire key personnel.

        Our future success depends in part on our ability to retain our key technical, sales, marketing and executive personnel and our ability to identify and hire additional qualified personnel. Competition for these personnel is intense, both in the industry in which we operate and also in Santa Clara and San Diego, where our headquarters and the majority of our operations are located. Further, we expect to grow our operations, and our needs for additional management and other key personnel are expected to increase. If we are not able to retain existing key personnel, or identify and hire additional qualified personnel to meet expected growth, our business could be adversely impacted.

We face risks relating to our international sales, including inherent economic, political and regulatory risks, which could increase our costs, cause interruptions in our current business operations and stifle our growth opportunities.

        Our products are sold internationally, with the majority of our international sales to our customers in Japan and Europe. We currently sell and market our products by channeling products through distributor organizations and sales agents. Sales to foreign customers accounted for 14%, 20%, and 25% of our total revenue for the years ended December 31, 2007, 2006 and 2005, respectively. In January 2008, we entered into an agreement with bioMerieux that, among other matters, appoints bioMerieux as the exclusive distributor of all of our current rapid diagnostic products in all regions except the U.S., Japan and Scandinavia, starting in May 2008. Our international sales are subject to inherent economic, political and regulatory risks, which could increase our operating costs, cause

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interruptions in our current business operations and impede our international growth. These foreign risks include, among others:

        Currently, all of our international sales are negotiated for and paid in U.S. dollars. Nonetheless, these sales are subject to currency risks, since changes in the values of foreign currencies relative to the value of the U.S. dollar can render our products comparatively more expensive. These exchange rate fluctuations could negatively impact international sales of our products and our anticipated foreign operations, as could changes in the general economic conditions in those markets. In order to maintain a competitive price for our products in Europe and Japan, we may have to continue to provide discounts or otherwise effectively reduce our prices, resulting in a lower margin on products sold in these geographical territories. Continued change in the values of the Euro, the Japanese Yen and other foreign currencies could have a negative impact on our business, financial condition and results of operations. We do not currently hedge against exchange rate fluctuations, which means that we will be fully exposed to exchange rate changes.

Investor confidence and share value may be adversely impacted if we or our independent registered public accounting firm conclude that our internal controls over financial reporting are not effective.

        As directed by Section 404 of the Sarbanes-Oxley Act of 2002, the SEC adopted rules requiring us, as a public company, to include a report of management on our internal controls over financial reporting in our Annual Reports on Form 10-K that contains an assessment by management of the effectiveness of our internal controls over financial reporting. In addition, our independent registered public accounting firm must attest to the effectiveness of our internal controls over financial reporting. How companies are implementing these requirements, including internal control reforms, if any, to comply with Section 404's requirements, and how independent registered public accounting firms are applying these requirements and testing companies' internal controls, remain subject to uncertainty. The requirements of Section 404 of the Sarbanes-Oxley Act of 2002 are ongoing. We expect that our internal controls will continue to evolve as our business activities change. Although we seek to diligently and vigorously review our internal controls over financial reporting in an effort to ensure compliance with the Section 404 requirements, any control system, regardless of how well designed, operated and evaluated, can provide only reasonable, not absolute, assurance that its objectives will be met. If, during any year, our independent registered public accounting firm is not satisfied with our internal controls over financial reporting or the level at which these controls are documented, designed, operated, tested or assessed, or if the independent registered public accounting firm interprets the

23


requirements, rules or regulations differently than we do, then it may issue a report that is qualified. This could result in an adverse reaction in the financial marketplace due to a loss of investor confidence in the reliability of our financial statements and effectiveness of our internal controls, which ultimately could negatively impact the market price of our shares.

Risks Related to Our Common Stock

Our stock price has been highly volatile, and an investment in our stock could suffer a significant decline in value.

        The market price of our common stock has been highly volatile and has fluctuated substantially in the past. For example, between December 31, 2005 and December 31, 2007, the closing price of our common stock, as reported by the Nasdaq Global Market, has ranged from a low of $8.14 to a high of $20.84. We expect our common stock to continue to be subject to wide fluctuations in price in response to various factors, many of which are beyond our control, including:


        In addition, the stock market in general, and the Nasdaq Global Market and the market for technology companies in particular, have experienced significant price and volume fluctuations that, at times, have been unrelated or disproportionate to the operating performance of the relevant companies. In the past, following periods of volatility in the market price of a company's securities,

24

securities class action litigation has often been instituted. A securities class action suit against us could result in substantial costs, potential liabilities and the diversion of management's attention and resources.

Future sales by existing stockholders could depress the market price of our common stock.

        Sales of our common stock in the public market, or the perception that such sales could occur, could negatively impact the market price of our common stock. As of December 31, 2007:

        We are unable to estimate the number of shares of our common stock that may actually be resold in the public market since this will depend on the market price for our common stock, the individual circumstances of the sellers and other factors. We also have a number of institutional stockholders that own significant blocks of our common stock. If one or more of these stockholders were to sell large portions of their holdings in a relatively short time, for liquidity or other reasons, the prevailing market price of our common stock could be negatively affected.

Anti-takeover devices may prevent a sale, or changes in the management, of the Company.

        We have in place several anti-takeover devices, including a stockholder rights plan, that may have the effect of delaying or preventing a sale, or changes in the management, of the Company. For example, our bylaws require stockholders to give written notice of any proposal or director nomination to us within a specified period of time prior to any stockholder meeting.

        We may also issue shares of preferred stock without stockholder approval and on terms that our Board of Directors may determine in the future. The issuance of preferred stock could have the effect of making it more difficult for a third party to acquire a majority of our outstanding stock, and the holders of such preferred stock could have voting, dividend, liquidation and other rights superior to those of holders of our common stock.

We do not pay dividends and this may negatively affect the price of our stock.

        We have not paid dividends on our common stock and do not anticipate paying dividends on our common stock in the foreseeable future. The future price of our common stock may be adversely impacted because we have not paid and do not anticipate paying dividends.

Item 1B.    Unresolved Staff Comments

        None.

Item 2.    Properties

        Our executive, administrative, manufacturing and research and development operation is located in San Diego, California where we lease a 78,000 square-foot facility. The San Diego lease expires in 2014 with options to extend the lease for two additional five-year periods. In addition, we lease approximately 24,000 square feet of manufacturing, laboratory and office space in Santa Clara, California. The Santa Clara lease expires in 2014 with an option to extend for one additional five-year period.

        We believe that our facilities are adequate for our current needs, and we currently do not anticipate any material difficulty in renewing any of our leases as they expire or securing additional or

25


replacement facilities, in each case, on commercially reasonable terms. However, in anticipation of our growth strategy, we may pursue alternative facilities.

Item 3.    Legal Proceedings

        None.

Item 4.    Submission of Matters to a Vote of Security Holders

        There were no matters submitted to a vote of security holders during the fourth quarter of 2007.

26


Part II

Item 5.    Market for Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities

COMMON STOCK PRICE RANGE

        Our common stock is traded on the Nasdaq Global Market under the symbol "QDEL." The following table sets forth the range of high and low closing prices for our common stock for the periods indicated.

Quarter Ended
   Low
   High
December 31, 2007   $ 17.71   $ 20.84
September 30, 2007     13.57     19.56
June 30, 2007     12.18     17.56
March 31, 2007     10.20     13.96

December 31, 2006
 
$
13.44
 
$
15.81
September 30, 2006     8.14     13.83
June 30, 2006     8.88     13.00
March 31, 2006     9.11     12.82

        No cash dividends were declared for our common stock during the fiscal years ended in 2007 or 2006, and we do not anticipate paying any dividends in the foreseeable future. As of February 20, 2008, we had approximately 564 common stockholders of record.

Stock Repurchases

        The table below sets forth information regarding repurchases of our common stock by us during the three months ended December 31, 2007. There were no repurchases of equity securities under our previously announced stock repurchase program during the fourth quarter of 2007.

 
   Total number
of shares
purchased(1)
   Average
price paid
per share
   Total number
of shares purchased
as part of publicly
announced program
   Approximate dollar
value of shares that
may yet be
purchased
under the program(2)
October 1 - October 31, 2007   —   $ —   —   $ 21,445,000
November 1 - November 30, 2007   —     —   —     21,445,000
December 1 - December 31, 2007   192     18.23   —     21,445,000
   
 
 
 
Ending Balance - December 31, 2007   192   $ 18.23   2,776,038   $ 21,445,000
   
 
 
 
(1)
In addition to and apart from our stock repurchase program described below, 192 shares of common stock were repurchased by us in connection with payment of minimum tax withholding obligations relating to the lapse of restrictions on certain restricted stock awards during the three months ended December 31, 2007.

(2)
In June 2005, we announced that our Board of Directors authorized us to repurchase up to $25.0 million in shares of our common stock under our stock repurchase program. In March 2007, we announced that our Board of Directors authorized us to purchase up to an additional $25.0 million in shares of our common stock under our stock repurchase program. Any shares of common stock repurchased under this program will no longer be deemed outstanding upon repurchase and will be returned to the pool of authorized shares. This repurchase program will expire no later than March 9, 2009 unless extended by our Board of Directors.

27

Equity Compensation Plan Information

        Information regarding our equity compensation plans is set forth in the section titled "Equity Compensation Plan Information" in our 2008 Proxy Statement to be filed with the SEC no later than April 29, 2008.


STOCKHOLDER RETURN PERFORMANCE GRAPH

        Set forth below is a line graph comparing the yearly percentage change in the cumulative total stockholder return on our common stock with the cumulative total return of the Nasdaq Composite Index and the Nasdaq Pharmaceutical Index for the period beginning December 31, 2002 and ending December 31, 2007. The graph assumes an initial investment of $100 on December 31, 2002 in our common stock, the Nasdaq Composite Index and the Nasdaq Pharmaceutical Index and reinvestment of dividends. The stock price performance of our common stock depicted in the graph represents past performance only and is not necessarily indicative of future performance.


Comparison Of Five Year Cumulative Total Return*

Among Quidel Corporation, The NASDAQ Composite Index

And The NASDAQ Pharmaceutical Index

CHART

Company/Index
   Base Period
12/31/02
   12/31/03
   12/31/04
   12/31/05
   12/31/06
   12/31/07
Quidel Corporation   $ 100.00   $ 310.46   $ 146.44   $ 310.18   $ 392.62   $ 561.26
Nasdaq Composite     100.00     149.75     164.64     168.60     187.83     205.22
Nasdaq Pharmaceutical     100.00     144.89     160.46     160.65     163.42     154.46
*
$100 invested on 12/31/02 in stock or index, including reinvestment of dividends. Fiscal year ending December 31.

28

Item 6.    Selected Financial Data

        The following table presents selected consolidated financial data of Quidel Corporation. This historical data should be read in conjunction with the Consolidated Financial Statements and related notes thereto in Item 8 and "Management's Discussion and Analysis of Financial Condition and Results of Operation" in Item 7 in this Annual Report.

Consolidated Statements of Operations

 
   Year ended December 31,
  
 
   2007
   2006
   2005(1)
   2004
   2003(2)
  
 
   (in thousands, except per share data)

  
Total revenues   $ 118,065   $ 106,015   $ 92,299   $ 78,691   $ 92,463  
Costs and expenses                                
  Cost of sales (excludes amortization of intangible assets)     48,573     44,818     37,101     35,234     40,943  
  Research and development     12,855     13,047     12,829     11,340     8,465  
  Sales and marketing     18,491     16,966     16,121     13,990     15,977  
  General and administrative     13,167     12,770     13,062     14,852     10,003  
  Amortization of intangible assets     5,493     4,580     1,476     1,459     1,517  
  Patent litigation settlement     —     —     17,000     —     —  
  Restructuring     —     —     —     —     1,966  
   
 
 
 
 
 
    Total costs and expenses     98,579     92,181     97,589     76,875     78,871  
   
 
 
 
 
 
Operating income (loss)     19,486     13,834     (5,290 )   1,816     13,592  
Other income (expense)                                
  Interest income     1,891     1,408     722     398     154  
  Interest expense     (736 )   (757 )   (808 )   (886 )   (980 )
  Other income (expense)     (117 )   545     49     256     253  
   
 
 
 
 
 
    Total other income (expense)     1,038     1,196     (37 )   (232 )   (573 )
   
 
 
 
 
 
Income (loss) from continuing operations before provision (benefit) for income taxes     20,524     15,030     (5,327 )   1,584     13,019  
Provision (benefit) for income taxes     6,893     (5,891 )   3,000     —     (8,315 )
   
 
 
 
 
 
Income (loss) from continuing operations     13,631     20,921     (8,327 )   1,584     21,334  
   
 
 
 
 
 
Gain (loss) from discontinued operations, net of taxes     —     797     (932 )   (7,871 )   (1,683 )
   
 
 
 
 
 
Net income (loss)   $ 13,631   $ 21,718   $ (9,259 ) $ (6,287 ) $ 19,651  
   
 
 
 
 
 
Basic earnings (loss) per share:                                
  Continuing operations   $ 0.43   $ 0.63   $ (0.26 ) $ 0.05   $ 0.73  
  Discontinued operations     0.00     0.02     (0.03 )   (0.25 )   (0.06 )
  Net income (loss)     0.43     0.66     (0.28 )   (0.20 )   0.67  
Diluted earnings (loss) per share:                                
  Continuing operations   $ 0.41   $ 0.61   $ (0.26 ) $ 0.05   $ 0.70  
  Discontinued operations     0.00     0.02     (0.03 )   (0.25 )   (0.06 )
  Net income (loss)     0.41     0.63     (0.28 )   (0.20 )   0.65  
Shares used in basic per share calculation     32,028     32,985     32,525     31,487     29,177  
Shares used in diluted per share calculation     32,996     34,367     32,525     31,487     30,374  

29

Balance Sheet Data

 
   December 31
 
   2007
   2006
   2005(1)
   2004
   2003(2)
 
   (in thousands)
Cash and cash equivalents   $ 45,489   $ 36,625   $ 34,930   $ 36,322   $ 25,627
Working capital   $ 70,259   $ 53,063   $ 43,984   $ 49,769   $ 49,529
Total assets   $ 133,838   $ 127,048   $ 113,848   $ 112,691   $ 117,249
Long-term obligations   $ 9,161   $ 9,166   $ 9,986   $ 10,780   $ 11,258
Stockholders' equity   $ 107,703   $ 103,276   $ 87,243   $ 90,185   $ 89,780
Common shares outstanding     32,706     33,530     33,778     31,848     30,406
(1)
During the second quarter of 2005, we entered into an agreement to settle certain patent litigation. In conjunction with the settlement, we recorded a charge of $17.0 million in the first quarter of 2005, which amount was paid in April 2005.

(2)
This period has been restated for the impact of discontinued operations, which occurred during the fourth quarter of 2004.

30

Item 7.    Management's Discussion and Analysis of Financial Condition and Results of Operation

        The following discussion of our financial condition and results of operation contains forward-looking statements within the meaning of the federal securities laws that involve material risks and uncertainties. This discussion should be read in conjunction with "A Warning About Forward-Looking Statements" on page 2 and "Risk Factors" under Item 1A of this Annual Report. In addition, our discussion of the financial condition and results of operation of Quidel Corporation in this Item 7 should be read in conjunction with our Consolidated Financial Statements and the related notes included elsewhere in this Annual Report.

Executive Summary

        We have a leadership position in the development, manufacturing and marketing of rapid diagnostic solutions at the point-of-care ("POC") in infectious diseases and reproductive and women's health. We focus on POC testing solutions specifically developed for the physician office lab ("POL") and acute care markets globally. We primarily earn revenue from sales of products for use in physician offices, hospitals, clinical laboratories, retail clinics and wellness screening centers. We market our products in the U.S. through a network of national and regional distributors, supported by a direct sales force. Internationally, we sell and market primarily in Japan and Europe by channeling products through distributor organizations and sales agents. Starting in May 2008, bioMerieux S.A. ("bioMerieux") will become our exclusive distributor for all of our current QuickVue® rapid diagnostic tests in all regions except the U.S., Japan and Scandinavia.

        A majority of our total revenues relate to three product families. For the years ended December 31, 2007, 2006 and 2005, we derived approximately 81%, 82% and 78%, respectively, of our total revenues from sales of our influenza, Group A Strep and pregnancy tests. Additionally, a significant portion of our total revenue are from a relatively small number of distributors. Approximately 52%, 59% and 63% of our total revenue for the years ended December 31, 2007, 2006 and 2005, respectively, were related to sales through our four largest distributors in each of those periods.

        We also develop research products through our Specialty Products Group (the "SPG") with an emphasis on potential future rapid test applications. The SPG is currently responsible for more than 100 of our clinical and research products used worldwide in reference laboratories and in research applications at leading universities and biotechnology companies. The SPG revenues, income and assets are less than 10% of our overall operations.

        Our net revenue increased to $118.1 million for the year ended December 31, 2007 from $106.0 million for the year ended December 31, 2006. This was largely driven by increased domestic sales of our infectious disease and reproductive and women's health products as we continued to focus our efforts to strengthen market and brand leadership in infectious disease and reproductive and women's health by delivering economic and clinical proof through our efforts with our Quidel Value Build™ ("QVB™") program. Our POC testing solutions are designed to provide specialized results that meet two important value criteria that we have branded as QVB™:

        We focus on ensuring market leadership and providing points of differentiation by specializing in the diagnosis and monitoring of selected disease states. In order to support our value proposition as a company that markets the highest quality products in support of better medical outcomes, we are highlighting our QVB™ through the development of new innovations and the communication of new

31


solutions in the field of rapid diagnostic testing. Our QVB™ includes significant work in understanding the needs of the end-use customer, building products that meet those needs, providing proof studies to validate rapid diagnostic testing at the point-of-care and leveraging the work of researchers and key opinion leaders studying our tests and technology to help enhance the health and well being of people around the globe. Our marketing strategy includes ensuring each of our key product portfolios is supported by economic and clinical validation that shows hospitals, acute care facilities and POC clinicians that these tests deliver high quality results in a cost-effective manner.

        We believe that the trend among healthcare providers to adopt POC testing continues to increase, and demographic changes, reimbursement policies, a shortage of skilled laboratory workers and the availability of clinically valuable tests will increase growth in this diagnostic category. More and more employers, health plans and payers are recognizing that POC testing is a cost-effective means for improving the quality of care and patient satisfaction. Continuous improvements in technologies are resulting in a growing number of new diagnostic tests that combine high levels of accuracy with rapid, easy-to-use product formats. It is our mission to further establish our significant leadership position in POC rapid diagnostics. In order to accomplish this mission, our strategy is to:

32

        As a business in a highly regulated and competitive industry, we face many risks and challenges and we also have opportunities. There are many economic and industry factors that affect our business; some of the more important factors are outlined below:

        We have entered into an agreement to form a long-term global alliance with bioMerieux in the area of rapid clinical diagnostics for the point-of-care. Starting in May 2008, bioMerieux will become our primary distributor for our current QuickVue® rapid diagnostic tests in all regions except the U.S., Japan and Scandinavia.

        In September 2007, we entered an exclusive partnership to provide Roche Pharma AG with the QuickVue® Influenza A+B rapid diagnostic test for marketing activities related to its Tamiflu® (Oseltamivir) antiviral drug for the 2007-2008 influenza season in Germany. The agreement will leverage the strength and speed of the QuickVue® rapid test to help characterize influenza infection along with the Tamiflu® treatment to improve patient recovery time. Subsequently, we also launched a pilot program with Roche in the U.S. for the 2007-08 flu season, which complements the collaboration already underway in Germany.

Outlook

        For fiscal year 2008, we anticipate continued year-over-year revenue growth in our infectious disease and reproductive and women's health product lines. We expect gross margins will continue to be positively affected by a more favorable product and geographical mix, increased unit volumes and to a lesser extent increased average selling prices. While we experienced significant year-over-year growth of our immunoassay fecal occult blood test ("iFOB") in 2007, we continue to expect a gradual conversion of the fecal occult blood test market from the current guaiac-based test to an immunochemical-based test. Successful conversion of this market requires changing physician behavior through education, focused in part on clinical and economic validation. Additionally, we expect our respiratory syncytial virus ("RSV") product to be a well-received companion test to our QuickVue® Influenza test so that physicians are well prepared to diagnose and appropriately manage patients with influenza and/or RSV. We received Clinical Laboratory Improvement Amendments of 1988 ("CLIA") waiver on our RSV test in February 2008. Internationally, we expect our global alliance with bioMerieux to increase the reach of our products to markets around the world. Over recent historical

33


periods, the company has grown operating expenses at a rate less than our revenue growth rate, and we expect this to continue for fiscal 2008.

        You should also refer to the discussion in Item 1A, "Risk Factors" in Part I of this Annual Report for further discussion of risks related to our business.

Results of Operations

Comparison of years ended December 31, 2007 and 2006

Total Revenues

        The following table compares total revenues for the years ended December 31, 2007 and 2006 (in thousands, except percentages):

 
   For the year ended
December 31,
   Increase (decrease)
  
 
   2007
   2006
   $
   %
  
Net product sales   $ 116,890   $ 104,732   $ 12,158   12 %
Royalty income and license fees     1,175     1,283     (108 ) (8 )%
   
 
 
     
Total revenues   $ 118,065   $ 106,015   $ 12,050   11 %
   
 
 
     

        The increase was largely driven by an increase in sales of our infectious disease and reproductive and women's health products of $7.3 million and $2.4 million, respectively. The overall increase was partially offset by an expected decrease of our influenza product revenues in our Japanese market. We believe the increase in total revenue from these product groups was due to successes related to our QVB™ programs, which have resulted in strengthened customer relationships and preferred partnership programs. We believe that sales of our influenza products continue to increase as a result of increased market awareness, greater utilization and the demonstrated quality of our test. We believe our average selling price in the U.S. has continued to increase largely as a result of our clinical proof claims and product quality, while we have experienced downward pressure in the Japanese market as a result of reimbursement changes and increased competition. Sales of our infectious disease and reproductive and women's health products accounted for 88% and 89% of our total revenue for the years ended December 31, 2007 and 2006, respectively.

        The revenue from royalty income and license fees for all periods primarily relate to royalty payments earned on patented technologies of ours utilized by third parties.

Cost of Sales

        Cost of sales increased 8% to $48.6 million, or 41% of total revenue, for the year ended December 31, 2007 compared to $44.8 million, or 42% of total revenues, for the year ended December 31, 2006. The absolute dollar increase was primarily related to the increase in direct costs (material and labor) associated with the 11% increase in total revenues. The percentage decrease in cost of sales to revenue was primarily due to a more favorable product and geographic mix and the leveraging of fixed costs associated with higher unit volume and increased average selling prices.

34

Operating Expenses

        The following table compares operating expenses for the years ended December 31, 2007 and 2006 (in thousands, except percentages):

 
   For the year ended December 31,
    
    
  
 
   Increase (decrease)
  
 
   2007
   2006
  
 
   Operating
expenses
   As a % of
total
revenues
   Operating expenses
   As a % of
total
revenues
   $
   %
  
Research and development   $ 12,855   11 % $ 13,047   12 % $ (192 ) (1 )%
Sales and marketing     18,491   16 %   16,966   16 %   1,525   9 %
General and administrative     13,167   11 %   12,770   12 %   397   3 %
Amortization of intangible assets     5,493   5 %   4,580   4 %   913   20 %

Research and Development Expense

        Our research and development expenses were relatively constant. While we may experience some fluctuation in our research and development activities associated with the timing of certain projects, the primary components of research and development expense are personnel and material costs associated with development of potential new technologies and processes and with products under development. In addition, we continue to incur costs related to intellectual property, clinical activity as well as our overall efforts under our QVB™ programs.

Sales and Marketing Expense

        The increase in sales and marketing expense was primarily related to an overall increase in sales personnel and related programs and expenses, which support our leadership position and strategies to capitalize further on opportunities in POC diagnostics. Other key components of this expense relate to continued investment in assessing future product extensions and enhancements, market research (including voice of customer surveys), programs aimed at distribution partners and end-user customers and reimbursement-related activities and product shipment costs.

General and Administrative Expense

        The increase in general and administrative expenses was primary driven by increased stock compensation expense and costs associated with the departure of our former Chief Financial Officer and hiring a new Chief Financial Officer.

Amortization of Intangible Assets

        The increase in the amortization of intangible assets was primarily due to a license agreement entered into during late 2006 and an additional license agreement entered into during 2007.

Other Income (Expense)

        Interest income was $1.9 million and $1.4 million for the years ended December 31, 2007 and 2006, respectively. The increase in interest income was largely related to the increase in our average cash balance as well as more favorable interest rates for the year ended December 31, 2007 as compared to the prior year. Interest expense was relatively constant at $0.7 million for both of the years ended December 31, 2007 and 2006. Interest expense relates to interest paid on obligations under capital leases, primarily associated with our San Diego facility.

35

Income Taxes

        We recognized income tax expense of $6.9 million for the year ended December 31, 2007 versus a tax benefit of $5.9 million for the year ended December 31, 2006. Income tax expense for 2007 includes a reduction of $0.7 million for the completion of a research and development tax credit study for prior years. For 2006, we recorded a tax benefit which was primarily related to a decrease in the deferred tax valuation allowance during the fourth quarter ended December 31, 2006 and recognizes the deferred tax asset amount considered by management, more likely than not, to be realized.

Comparison of years ended December 31, 2006 and 2005

Total Revenues

        The following table compares total revenues for the years ended December 31, 2006 and 2005 (in thousands, except percentages):

 
   For the year ended December 31,
   Increase (decrease)
  
 
   2006
   2005
   $
   %
  
Net product sales   $ 104,732   $ 88,731   $ 16,001   18 %
Research contracts, license fees and royalty income     1,283     3,568     (2,285 ) (64 )%
   
 
 
     
Total revenues   $ 106,015   $ 92,299   $ 13,716   15 %
   
 
 
     

        The increase in total revenue was largely driven by an increase in sales of our infectious disease products of $14.3 million. The overall increase was partially offset by a decrease of influenza product revenues in our Japanese market. For the year ended December 31, 2006, we believe revenue from these products continued to increase due to successes related to our QVB™ programs, which have resulted in strengthened customer relationships and preferred partnership programs. We believe that sales of our infectious disease products continued to increase as a result of increased market awareness and the demonstrated quality of our test. We believe our average selling price in the U.S. continued to increase largely as a result of our clinical proof claims and product quality, while we experienced downward pressure in the Japanese market as a result of reimbursement changes and increased competition. This product line collectively accounted for 65% and 59% of our total revenue for the years ended December 31, 2006 and 2005, respectively.

Research Contracts, License Fees and Royalty Income

        The decrease for the year ended December 31, 2006 was primarily related to research contract revenue that we earned during the year ended December 31, 2005 in connection with achieving certain milestones under a joint development agreement with another company. During the second quarter of 2005, the joint development agreement was terminated. The balance of this revenue for all periods primarily relates to royalty payments earned on patented technologies of ours utilized by third parties.

Cost of Sales

        Cost of sales increased 21% to $44.8 million, or 42% of total revenue for the year ended December 31, 2006 compared to $37.1 million, or 40% of total revenues for the year ended December 31, 2005. The absolute dollar increase was primarily related to the increase in direct costs (material and labor) associated with the 15% increase in total revenues. The percentage increase in cost of sales to revenue was primarily due to the 8.5% royalty we began paying on the majority of our products during the second quarter of 2005 related to the patent litigation settlement with Inverness Medical Innovations, Inc. ("IMA") and strategic investments in our operational infrastructure, partially

36


offset by a more favorable product and geographic mix, higher unit volume and increased average selling prices.

        In connection with the patent litigation settlement entered into during the second quarter of 2005, we were required, as of May 2005, to pay an 8.5% royalty on net sales of our current influenza, Group A Strep, pregnancy, H. pylori, mononucleosis, Chlamydia, iFOB, RSV and veterinary products. These product sales accounted for 92% of total revenue for the year ended December 31, 2006 and 88% for the year ended December 31, 2005. Also for the year ended December 31, 2006, the cost of sales as a percentage of total revenues was favorably impacted compared to 2005 as we fulfilled the terms of an agreement with another party related to the development of our influenza product during the first quarter of 2005. We are no longer required to pay this party a 6% royalty on sales of our influenza product.

Operating Expenses

        The following table compares operating expenses for the years ended December 31, 2006 and 2005 (in thousands, except percentages):

 
   For the year ended December 31,
    
    
  
 
   Increase
(decrease)
  
 
   2006
   2005
  
 
   Operating
expenses
   As a % of
total
revenues
   Operating
expenses
   As a % of
total
revenues
   $
   %
  
Research and development   $ 13,047   12 % $ 12,829   14 % $ 218   2 %
Sales and marketing     16,966   16 %   16,121   17 %   845   5 %
General and administrative     12,770   12 %   13,062   14 %   (292 ) (2 )%
Amortization of intangible assets     4,580   4 %   1,476   2 %   3,104   210 %

Research and Development Expense

        Our research and development expenses were relatively constant. The primary components of this expense are personnel and material costs associated with development of potential new technologies and processes and with products under development. In addition, we continued to incur substantial costs related to clinical trials as well as our overall effort under our QVB™ programs.

Sales and Marketing Expense

        The primary components of this expense relate to continued investment in assessing future product extensions and enhancements, market research (including voice of customer surveys), programs aimed at distribution partners and end-user customers and reimbursement-related activities and product shipment costs. We also increased our sales force to further support our leadership position and seek to take advantage of further opportunities in POC diagnostics.

General and Administrative Expense

        The decrease in general and administrative expenses for the year ended December 31, 2006 was primarily due to decreased legal fees of $2.3 million associated primarily with the settlement of our intellectual property litigation with IMA during 2005, partially offset by increases in personnel costs associated with stock-based compensation and management incentive plans.

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Patent Litigation Settlement

        As previously disclosed, during the second quarter of 2005 we entered into an agreement to settle certain patent litigation with IMA and recorded a charge of $17.0 million in the first quarter of 2005, which amount was paid in April 2005.

Amortization of Intangible Assets

        The increase in amortization of intangible assets for the year ended December 31, 2006 was primarily due to the amortization of intellectual property related to two license agreements entered into during late 2005 and an additional license agreement entered into during late 2006.

Other Income (Expense)

        Interest income was $1.4 million and $0.7 million for the years ended December 31, 2006 and 2005, respectively, and relates primarily to interest earned on our cash and cash equivalents balance. Interest expense was $0.8 million for both of the years ended December 31, 2006 and 2005 and relates to interest paid on obligations under capital leases, which are primarily related to our San Diego facility. Other income increased to $0.5 million for the year ended December 31, 2006 from $0.1 million for the year ended December 31, 2005. During the fourth quarter of 2006, we also recognized non-cash income of approximately $0.5 million associated with certain remaining balance sheet credits of a foreign entity which was previously closed.

Income Taxes

        We recorded a tax benefit of $5.9 million for the year ended December 31, 2006 versus a tax provision of $3.0 million for the year ended December 31, 2005. This change is due primarily to a decrease in the deferred tax valuation allowance during the fourth quarter ended December 31, 2006 and recognizes the deferred tax asset amount considered by management, more likely than not, to be realized.

Liquidity and Capital Resources

        As of December 31, 2007, our principal sources of liquidity consisted of $45.5 million in cash and cash equivalents as well as $30.0 million available to us under our credit facility, as described below. Our working capital as of December 31, 2007 was $70.3 million.

        Our operating activities provided $27.3 million of cash for the year ended December 31, 2007. In addition to the impact on cash from net income, we had increases in accounts receivable and accounts payable related to the timing of sales during the fourth quarter of 2007. Inventory was higher as a result of increased production activities for the cold and flu season. Additionally, the increase in accrued payroll was related to an overall increase in our headcount. The increase in other accrued liabilities was primarily related to amounts due under an acquired license and a non-compete agreement.

        Our investing activities used $3.8 million during the year ended December 31, 2007. This included $3.1 million for the acquisition of production and scientific equipment and building improvements and $0.6 million for acquisition of intangible assets. We had investments in property, plant and equipment and intangible assets of $1.0 million and $0.6 million, respectively, which have not been paid as of December 31, 2007.

        We are currently planning approximately $6.0 million in capital expenditures over the next 12 months. The primary purpose for our capital expenditures is to acquire manufacturing equipment, implement facility improvements, and for information technology. We plan to fund these capital

38


expenditures with cash flow from operations. We do not have any firm purchase commitments with respect to such planned capital expenditures as of the date of filing this report.

        Our financing activities used $14.7 million of cash during the year ended December 31, 2007 and were primarily related to the repurchase of approximately 1.6 million shares of stock in the open market at a cost of $17.9 million and payments on obligations under our capital leases related to our building in San Diego of $0.7 million, partially offset by proceeds of $2.8 million received from the issuance of common stock under our equity incentive and our employee stock purchase plans and $1.0 million in tax benefit from exercise and disposition of employee stock options.

        We currently have a $30.0 million credit facility (the "Senior Credit Facility"), which matures on June 30, 2009. The Senior Credit Facility bears interest at a rate ranging from 0% to 0.75% plus the lender's prime rate or, at our option, a rate ranging from 0.75% to 1.75% plus the London InterBank Offering Rate. The agreement governing our Senior Credit Facility also contains certain customary covenants restricting our ability to, among other matters, incur additional indebtedness, create liens or other encumbrances, pay dividends or make other restricted payments, make investments, loans and guarantees or sell or otherwise dispose of a substantial portion of assets to, or merge or consolidate with, another entity. The terms of the Senior Credit Facility require us to comply with certain financial covenants, including: a minimum net worth, a maximum ratio of debt drawn under the Senior Credit Facility to earnings before interest, taxes, depreciation and amortization ("EBITDA") and a fixed charge coverage ratio. As of December 31, 2007, we had $30.0 million of availability under the Senior Credit Facility and we were in compliance with all covenants. See Note 2 in the Notes to the Consolidated Financial Statements included in this Annual Report

        We also intend to continue evaluation of acquisition and technology licensing candidates. As such, we may need to incur additional debt, or sell additional equity, to successfully complete these transactions. Cash requirements fluctuate as a result of numerous factors, such as the extent to which we generate cash from operations, progress in research and development projects, competition and technological developments and the time and expenditures required to obtain governmental approval of our products. Based on our current cash position and the current assessment of future operating results, we believe that our existing sources of liquidity will be adequate to meet operating needs during the next 12 months and the foreseeable future.

Off-Balance Sheet Arrangements

        At December 31, 2007 and 2006, we did not have any other relationships with unconsolidated entities or financial partners, such as entities often referred to as structured finance or special purpose entities, which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. As such, we are not materially exposed to any financing, liquidity, market or credit risk that could arise if we had engaged in such relationships.

39

Contractual Obligations

        Our facilities and certain equipment are leased under noncancelable capital and operating leases. The following is a summary of our contractual obligations (in thousands):

 
   Payment due by period
 
   Total
   Less than
1 year
   1-3
Years
   3-5
Years
   More than
5 years
Capital lease obligations(1)   $ 10,439   $ 1,404   $ 2,893   $ 3,010   $ 3,132
Operating lease obligations(2)     5,908     830     1,699     1,716     1,663
   
 
 
 
 
Total   $ 16,347   $ 2,234   $ 4,592   $ 4,726   $ 4,795
   
 
 
 
 
(1)
Reflects obligations on facilities and equipment under capital leases, including current maturities, in place as of December 31, 2007. Future minimum lease payments are included in the table above.

(2)
Reflects obligations on facilities and equipment under operating leases in place as of December 31, 2007. In the fourth quarter of 2007, we entered into a new operating lease at our Santa Clara location, including extending the term of the lease through 2014. Future minimum lease payments are included in the table above.

        We have entered into various licensing agreements, which require royalty payments based on specified product sales. These agreements, which have anticipated expiration dates through 2019, encompass the majority of our products. Royalty expenses under these licensing agreements, which are charged to cost of sales, collectively totaled $9.4 million, $9.6 million and $7.1 million for the years ended December 31, 2007, 2006 and 2005, respectively. We believe we will continue to incur substantial royalty expenses relating to future sales of our products.

Critical Accounting Policies and Estimates

        Our discussion and analysis of our financial condition and results of operations are based on our consolidated financial statements, which have been prepared in accordance with accounting principles generally accepted in the U.S. The preparation of these financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an on-going basis, we evaluate our estimates, including those related to customer programs and incentives, bad debts, inventories, intangible assets, income taxes, restructuring and contingencies and litigation. We base our estimates on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

        We believe the following critical accounting policies affect our more significant judgments and estimates used in the preparation of our consolidated financial statements:

        Prior to January 1, 2006, we accounted for our share-based employee and director compensation plans under the measurement and recognition provisions of Accounting Principles Board Opinion No. 25, "Accounting for Stock Issued to Employees," and related Interpretations, as permitted by Financial Accounting Standards Board ("FASB") Statement of Financial Accounting Standards ("SFAS") No. 123, "Accounting for Stock-Based Compensation." We recorded no share-based employee and director compensation expense for options granted under our 2001 Equity Incentive Plan or its

40

predecessor plans prior to December 31, 2005, as all options granted under those plans had exercise prices equal to or greater than the fair market value of our common stock on the date of grant. We did not have material compensation expense in connection with our Employee Stock Purchase Plan. In accordance with SFAS No. 123 and SFAS No. 148, "Accounting for Stock-Based Compensation—Transition and Disclosure," we disclosed our net income (loss) and net earnings (loss) per share as if we had applied the fair value-based method in measuring compensation expense for our share-based incentive programs.

        Effective January 1, 2006, we adopted the fair value recognition provisions of SFAS No. 123(R), "Share-Based Payment," using the modified prospective transition method. Under that transition method, compensation expense that we recognize beginning on that date includes: (a) compensation expense for all share-based awards granted prior to, but not yet vested as of December 31, 2005, based on the grant-date fair value estimated in accordance with the original provisions of SFAS No. 123, and (b) compensation expense for all share-based awards granted on or after January 1, 2006 based on the grant-date fair value estimated in accordance with the provisions of SFAS No. 123(R). Results for prior periods have not been restated.

        The computation of the expected option life is based on a weighted-average calculation combining the average life of options that have already been exercised and post-vest cancellations with the estimated life of the remaining vested and unexercised options. The expected volatility is based on the historical volatility of our stock. The risk-free interest rate is based on the U.S Treasury yield curve over the expected term of the option. We have never paid any cash dividends on our common stock and we do not anticipate paying any cash dividends in the foreseeable future. Consequently, we use an expected dividend yield of zero in the Black-Scholes option valuation model. The estimated forfeiture rate of our stock options is 12.7% and is based on our historical experience and future expectations.

        Compensation expense related to stock options granted is recognized ratably over the service vesting period for the entire option award. The total number of stock options expected to vest is adjusted by estimated forfeiture rates. The estimated fair value of each stock option was determined on the date of grant using the Black-Scholes option valuation model. Compensation expense for restricted stock awards ("stock awards") is measured at the grant date and recognized ratably over the vesting period. The fair value of stock awards is determined based on the closing market price of our common stock on the grant date. For stock awards granted prior to December 31, 2005, vesting is based on both the service period as well as the achievement of our performance goals. Meeting the performance goals for these awards allows for acceleration of a portion of the stock awards. A majority of the stock awards granted in 2006 and 2007 were performance-based and vesting is tied to achievement of predetermined revenue and/or EBITDA goals. For purposes of measuring compensation expense, the amount of shares ultimately expected to vest is estimated at each reporting date based on management's expectations regarding the relevant performance criteria. The recognition of compensation expense associated with performance-based grants requires judgment in assessing the probability of meeting the performance goals, as well as defined criteria for assessing achievement of the performance related goals. This may result in significant expense recognition in the period in which the performance goals are met or when achievement of the goals is deemed probable or may result in the reversal of previously recognized stock-based compensation expense if the performance criteria are deemed not probable of being met. The cumulative amount of stock-based compensation expense that has been recognized through December 31, 2007 related to stock awards with performance-related vesting criteria for which the performance criteria have not yet been met is $0.8 million. The grant date of the performance-based stock grants takes place when the grant is authorized and the specific achievement goals are communicated. The communication date of the performance goals can impact the valuation and associated expense of the stock awards.

41

        We record revenues primarily from product sales. These revenues are recorded net of rebates and other discounts which are estimated at the time of sale. The rebates and other discounts are largely driven by various customer program offerings, including special pricing agreements, promotions and other volume-based incentives. Revenue from product sales is recorded upon passage of title and risk of loss to the customer. Change in title to the product and recognition of revenue occur upon delivery to the customer when sales terms are free on board ("FOB") destination and at the time of shipment when the sales terms are FOB shipping point and there is no right of return. We also earn income from the licensing of technology and have previously earned income from performing services under a joint development agreement. Royalty income from the grant of license rights is recognized during the period in which the revenue is earned and the amount is determinable from the licensee. Milestone payments, arising under joint development agreements, were previously recognized when earned, as evidenced by written acknowledgment from the collaborator or other persuasive evidence that the milestone had been achieved, provided that (i) the milestone event was substantive and its achievability was not reasonably assured at the inception of the agreement, and (ii) our performance obligations after the milestone achievement would continue to be funded by the collaborator at a level comparable to before the milestone achievement. If both of these criteria were not met, the milestone payment would be recognized over the remaining minimum period of our performance obligations under the agreement. Income earned from licensing activities is a component of total revenues in the accompanying Consolidated Statements of Operations.

        We maintain an allowance for doubtful accounts for estimated losses resulting from the inability of our customers to make required payments. Our allowance for doubtful accounts is based on our assessment of the collectibility of specific customer accounts, the aging of accounts receivable, our history of bad debts, and the general condition of the industry. If a major customer's credit worthiness deteriorates, or our customers' actual defaults exceed our historical experience, our estimates could change and adversely impact our reported results.

        Our policy is to value inventories at the lower of cost or market on a part-by-part basis. This policy requires us to make estimates regarding the market value of our inventories, including an assessment of excess or obsolete inventories. We determine excess and obsolete inventories based on an estimate of the future demand for our products within a specified time horizon, generally 12 months. The estimates we use for demand are also used for near-term capacity planning and inventory purchasing and are consistent with our revenue forecasts. If our demand forecast is greater than our actual demand, we may be required to take additional excess inventory charges, which would decrease gross margin and adversely impact net operating results in the future.

        Intangible assets with definite lives are amortized over their estimated useful lives. Useful lives are based on the expected number of years the asset will generate revenue or otherwise be used by us. On January 1, 2002, we adopted SFAS No. 142 "Goodwill and Other Intangible Assets," which requires that goodwill and other intangible assets that have indefinite lives not be amortized but instead be tested at least annually for impairment, or more frequently when events or changes in circumstances indicate that the asset might be impaired. Examples of such events or circumstances include:

42

        If a change were to occur in any of the above-mentioned factors or estimates, the likelihood of a material change in our reported results would increase.

        For indefinite-lived intangible assets, impairment is tested by comparing the carrying value of the asset to the fair value of the reporting unit to which the asset is assigned. For goodwill, a two-step test is used to identify the potential impairment and to measure the amount of impairment, if any. The first step is to compare the fair value of a reporting unit with the carrying amount, including goodwill. If the fair value of a reporting unit exceeds its carrying amount, goodwill is considered not impaired; otherwise, goodwill is impaired and the loss is measured by performing step two. Under step two, the impairment loss is measured by comparing the implied fair value of the reporting unit with the carrying amount of goodwill. SFAS No. 142 requires periodic evaluations for impairment of goodwill balances. We completed our annual evaluation for impairment of goodwill as of December 31, 2007 and determined that no impairment of goodwill existed.

        We account for income taxes in accordance with SFAS No. 109, "Accounting for Income Taxes." Significant judgment is required in determining our provision for income taxes, current tax assets and liabilities, deferred tax assets and liabilities, and our future taxable income for purposes of assessing our ability to realize future benefit from our deferred tax assets. A valuation allowance is established to reduce our deferred tax assets to the amount that is considered more likely than not to be realized through the generation of future taxable income and other tax planning opportunities. To the extent that a determination is made to establish or adjust a valuation allowance, the expense or benefit is recorded in the period in which the determination is made.

        Effective January 1, 2007, we adopted the provisions of FASB No. 48, "Accounting for Uncertainty in Income Taxes" ("FIN 48"). FIN 48 provides guidance for the recognition threshold and measurement attribute for financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. In accordance with FIN 48, we recognized a cumulative-effect adjustment of $0.7 million, increasing the January 1, 2007 balance of retained earnings. See Note 3 in the Notes to the Consolidated Financial Statements included in this Annual Report for more information on income taxes.

        As a result of the adoption of SFAS No. 123(R), we will recognize excess tax benefits associated with the exercise of stock options directly to stockholders' equity only when realized. Accordingly, deferred tax assets are not recognized for net operating loss carryforwards resulting from excess tax benefits. As of December 31, 2007 and 2006, deferred tax assets do not include $7.1 million and $6.0 million, respectively, of these excess tax benefits from employee stock option exercises that are a component of our net operating loss carryforwards. Additional paid-in capital will be increased up to $7.1 million if such excess tax benefits are realized.

        We will continue to assess the assumptions used to determine the valuation allowance. Should we determine that we would not be able to realize all or part of the other components of the deferred tax asset in the future, an adjustment to the deferred tax asset would be charged to earnings in the period such determination were made. Conversely, if based on estimates of future earnings, we determined that all or a portion of the valuation allowance is no longer warranted, a reduction in the valuation

43


would result in a corresponding credit to additional paid-in capital and/or income tax expense in the period such determination were made.

Item 7A.    Quantitative and Qualitative Disclosures About Market Risk

        The fair market value of our floating interest rate debt is subject to interest rate risk. Generally, the fair market value of floating interest rate debt will vary as interest rates increase or decrease. A hypothetical 100 basis point adverse move in interest rates along the entire interest rate yield curve would not materially affect the fair value of our interest sensitive financial instruments at December 31, 2007. Based on our market risk sensitive instruments outstanding at December 31, 2007 and 2006, we have determined that there was no material market risk exposure to our consolidated financial position, results of operations or cash flows as of such dates.

        Our current investment policy with respect to our cash and cash equivalents focuses on maintaining acceptable levels of interest rate risk and liquidity. Although we continually evaluate our placement of investments, as of December 31, 2007, our cash and cash equivalents were placed in money market or overnight funds that are highly liquid and which we believe are not subject to material market fluctuation risk.

        All of our international sales are negotiated for and paid in U.S. dollars. Nonetheless, these sales are subject to currency risks, since changes in the values of foreign currencies relative to the value of the U.S. dollar can render our products comparatively more expensive. These exchange rate fluctuations could negatively impact international sales of our products and our anticipated foreign operations, as could changes in the general economic conditions in those markets. Continued change in the values of the Euro, the Japanese Yen and other foreign currencies could have a negative impact on our business, financial condition and results of operations. We do not currently hedge against exchange rate fluctuations, which means that we will be fully exposed to exchange rate changes.

Item 8.    Financial Statements and Supplementary Data

        The consolidated financial statements and supplementary data required by this item are set forth at the pages indicated in Item 15(a)(1) and are incorporated herein.

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Part III

Item 9.    Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

        None.

Item 9A.    Controls and Procedures

        Evaluation of disclosure controls and procedures:    We have performed an evaluation under the supervision and with the participation of our management, including our Chief Executive Officer ("CEO") and Chief Financial Officer ("CFO"), of the effectiveness of our disclosure controls and procedures, as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934 (the "Exchange Act"). Based on that evaluation, our CEO and CFO concluded that our disclosure controls and procedures were effective as of December 31, 2007 to provide reasonable assurance that information required to be disclosed by us in the reports filed or submitted by us under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the SEC's rules and forms.

        Changes in internal control over financial reporting:    There was no change in our internal controls over financial reporting during the fourth quarter of 2007 that materially affected, or is reasonably likely to materially affect, our internal control over financial reporting.

        Management's Report on Internal Control Over Financial Reporting:    Our management is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rule 13a-15(f). Our internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of our financial statements for external purposes in accordance with U.S. generally accepted accounting principles. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Therefore, even those systems determined to be effective can provide only reasonable assurance with respect to financial statement preparation and presentation. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. Under the supervision and with the participation of our management, including our CEO and CFO, we conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control—Integrated Framework, issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on our evaluation under the framework in Internal Control—Integrated Framework, our management concluded that our internal control over financial reporting was effective as of December 31, 2007.

        The effectiveness of our internal control over financial reporting as of December 31, 2007 has been audited by Ernst & Young LLP, an independent registered public accounting firm, as stated in their report which is included in this Item 9A.

45


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM ON
INTERNAL CONTROL OVER FINANCIAL REPORTING

The Board of Directors and
Stockholders of Quidel Corporation

        We have audited Quidel Corporation's internal control over financial reporting as of December 31, 2007, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission ("the COSO criteria"). Quidel Corporation's management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying Management's Report on Internal Control Over Financial Reporting. Our responsibility is to express an opinion on the Company's internal control over financial reporting based on our audit.

        We conducted our audit in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects. Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

        A company's internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company's internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company's assets that could have a material effect on the financial statements.

        Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

        In our opinion, Quidel Corporation maintained, in all material respects, effective internal control over financial reporting as of December 31, 2007, based on the COSO criteria.

        We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the consolidated balance sheets of Quidel Corporation and subsidiaries as of December 31, 2007 and 2006, and the related consolidated statements of operations, stockholders' equity and cash flows for each of the three years in the period ended December 31, 2007 of Quidel Corporation and our report dated February 27, 2008 expressed an unqualified opinion thereon.

San Diego, California
February 27, 2008

46

Item 9B.    Other Information

2007 Annual Meeting of Stockholders

        The Company's 2008 Annual Meeting of Stockholders will be held on Tuesday, May 13, 2008, beginning at 8:30 a.m. (local time) at Hyatt Regency, La Jolla at Aventine, 3777 La Jolla Village Drive, San Diego, California, 92122.

Item 10.    Directors, Executive Officers and Corporate Governance

        The information required by this item (with respect to directors) is incorporated by reference from the information under the caption "Election of Directors" to be contained in our 2008 Proxy Statement, which will be filed with the SEC no later than April 29, 2008. Information with respect to executive officers is included under Item 1 on pages 13-14 of this Annual Report.

        The information required by Items 405, 406 and 407 of Regulation S-K is incorporated by reference from the information under the captions "Corporate Governance," "Code of Business Conduct and Ethics" and "Section 16(a) Beneficial Ownership Reporting Compliance," to be contained in our 2008 Proxy Statement, which will be filed with the SEC no later than April 29, 2008.

Item 11.    Executive Compensation

        The information required by this item is incorporated by reference from the information under the captions "Director Compensation" and "Executive Compensation" to be contained in our 2008 Proxy Statement, which will be filed with the SEC no later than April 29, 2008.

Item 12.    Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

        The information required by Items 201(d) and 403 of Regulation S-K is incorporated by reference from the information under the captions "Equity Compensation Plan Information" and "Security Ownership of Certain Beneficial Owners and Management" to be contained in our 2008 Proxy Statement, which will be filed with the SEC no later than April 29, 2008.

Item 13.    Certain Relationships and Related Transactions, and Director Independence

        The information required by this item is incorporated by reference from the information under the captions "Compensation Committee Interlocks and Insider Participation," "Certain Relationships and Related Transactions" and "Director Independence" to be contained in our 2008 Proxy Statement, which will be filed with the SEC no later than April 29, 2008.

Item 14.    Principal Accounting Fees and Services

        The information required by this item is incorporated by reference from the information under the caption "Independent Registered Public Accounting Firm" to be contained in our 2008 Proxy Statement, which will be filed with the SEC no later than April 29, 2008.

47


Part IV

Item 15.    Exhibits and Financial Statement Schedules

The following documents are filed as part of this Form 10-K:

(a)
(1)  Financial Statements

        The Consolidated Financial Statements required by this Item are submitted in a separate section beginning on page F-1 of this Annual Report and incorporated herein by reference.

Consolidated Financial Statements of Quidel Corporation

Report of Independent Registered Public Accounting Firm on Financial Statements   F-1
Consolidated Balance Sheets at December 31, 2007 and 2006   F-2
Consolidated Statements of Operations for the years ended December 31, 2007, 2006 and 2005   F-3
Consolidated Statements of Stockholders' Equity for the years ended December 31, 2007, 2006 and 2005   F-4
Consolidated Statements of Cash Flows for the years ended December 31, 2007, 2006 and 2005   F-5
Notes to Consolidated Financial Statements   F-6

        The following Financial Statement Schedule of Quidel Corporation for the years ended December 31, 2007, 2006 and 2005 is filed as part of this Annual Report and should be read in conjunction with the Consolidated Financial Statements of Quidel Corporation:

        Financial Statement Schedules not listed above have been omitted because of the absence of conditions under which they are required or because the required information is included in the Consolidated Financial Statements or the Notes thereto.

(b)
Exhibits

        The exhibits listed on the accompanying Exhibit Index immediately following the Financial Statement Schedule are filed as part of, and incorporated by reference into, this Annual Report on Form 10-K.

(c)
Financial Statements required by Regulation S-X which are excluded from this Annual Report on Form 10-K by Rule 14(a)-3(b).

        Not applicable.

48


SIGNATURES

        Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized.

    QUIDEL CORPORATION

Date: March 4, 2008
 
By
/s/ CAREN L. MASON
Caren L. Mason
 President, Chief Executive Officer
(Principal Executive Officer) and Director

        Pursuant to the requirements of the Securities Exchange Act of 1934, this Report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

Signature
   Title
   Date

 
 
 
 
 
/s/  CAREN L. MASON      
Caren L. Mason		   President, Chief Executive Officer (Principal Executive Officer), and Director   March 4, 2008

/s/  JOHN M. RADAK      
John M. Radak
 
Chief Financial Officer, (Principal Financial Officer and Accounting Officer)
 
March 4, 2008

/s/  MARK A. PULIDO      
Mark A. Pulido
 
Chairman of the Board
 
March 4, 2008

/s/  THOMAS D. BROWN      
Thomas D. Brown
 
Director
 
March 4, 2008

/s/  KENNETH F. BUECHLER      
Kenneth F. Buechler
 
Director
 
March 4, 2008

/s/  RODNEY F. DAMMEYER      
Rodney F. Dammeyer
 
Director
 
March 4, 2008

/s/  MARY LAKE POLAN      
Mary Lake Polan
 
Director
 
March 4, 2008

/s/  JACK W. SCHULER      
Jack W. Schuler
 
Director
 
March 4, 2008

49


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
ON FINANCIAL STATEMENTS

The Board of Directors and
Stockholders of Quidel Corporation

        We have audited the accompanying consolidated balance sheets of Quidel Corporation and subsidiaries as of December 31, 2007 and 2006, and the related consolidated statements of operations, stockholders' equity and cash flows for each of the three years in the period ended December 31, 2007. Our audits also included the financial statement schedule listed in the Index at Item 15(a)(2). These financial statements and schedule are the responsibility of the Company's management. Our responsibility is to express an opinion on these financial statements and schedule based on our audits.

        We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

        In our opinion, the financial statements referred to above present fairly, in all material respects, the consolidated financial position of Quidel Corporation and subsidiaries at December 31, 2007 and 2006, and the consolidated results of their operations and their cash flows for each of the three years in the period ended December 31, 2007 in conformity with U.S. generally accepted accounting principles. Also, in our opinion, the related financial statement schedule, when considered in relation to the basic financial statements taken as a whole, presents fairly in all material respects the information set forth therein.

        As discussed in Note 1 to the consolidated financial statements, Quidel Corporation adopted Statement of Financial Accounting Standards No. 123 (revised 2004) on January 1, 2006 and FASB Interpretation No. 48, "Accounting for Uncertainty in Income Taxes—an interpretation of FASB Statement No. 109," effective January 1, 2007.

        We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States), Quidel Corporation's internal control over financial reporting as of December 31, 2007, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 27, 2008 expressed an unqualified opinion thereon.

    /s/ ERNST & YOUNG LLP

San Diego, California
February 27, 2008

F-1


QUIDEL CORPORATION

CONSOLIDATED BALANCE SHEETS

(in thousands, except par value)

 
   December 31,
  
 
   2007
   2006
  
ASSETS              
Current assets:              
  Cash and cash equivalents   $ 45,489   $ 36,625  
  Accounts receivable, net     23,163     18,139  
  Inventories     11,037     9,625  
  Deferred tax asset—current     5,955     1,590  
  Prepaid expenses and other current assets     1,589     1,690  
   
 
 
    Total current assets     87,233     67,669  
Property, plant and equipment, net     19,926     20,058  
Intangible assets, net     14,320     18,797  
Deferred tax asset—non-current     11,923     20,065  
Other non-current assets     436     459  
   
 
 
Total assets   $ 133,838   $ 127,048  
   
 
 

LIABILITIES AND STOCKHOLDERS' EQUITY
 
 
 
 
 
 
 
Current liabilities:              
  Accounts payable   $ 5,618   $ 3,832  
  Accrued payroll and related expenses     4,341     4,868  
  Accrued royalties     3,289     3,559  
  Current portion of obligations under capital leases     764     675  
  Other current liabilities     2,962     1,672  
   
 
 
    Total current liabilities     16,974     14,606  
Capital leases, net of current portion     7,000     7,764  
Other non-current liabilities     2,161     1,402  
Commitments and contingencies              
Stockholders' equity:              
Preferred stock, $.001 par value per share; 5,000 shares authorized, none issued or outstanding at December 31, 2007 and 2006     —     —  
Common stock, $.001 par value per share; 50,000 shares authorized, 32,706 and 33,530 shares issued and outstanding at December 31, 2007 and 2006, respectively     33     33  
Additional paid-in capital     145,440     155,357  
Accumulated deficit     (37,770 )   (52,114 )
   
 
 
    Total stockholders' equity     107,703     103,276  
   
 
 
Total liabilities and stockholders' equity   $ 133,838   $ 127,048  
   
 
 

See accompanying notes.

F-2

QUIDEL CORPORATION

CONSOLIDATED BALANCE SHEETS

(in thousands, except par value)


QUIDEL CORPORATION

CONSOLIDATED STATEMENTS OF OPERATIONS

 
   Year ended December 31,
  
 
   2007
   2006
   2005
  
 
   (in thousands, except per share data)

  
Total revenues   $ 118,065   $ 106,015   $ 92,299  
Costs and expenses                    
  Cost of sales (excludes amortization of intangible assets)     48,573     44,818     37,101  
  Research and development     12,855     13,047     12,829  
  Sales and marketing     18,491     16,966     16,121  
  General and administrative     13,167     12,770     13,062  
  Amortization of intangible assets     5,493     4,580     1,476  
  Patent litigation settlement     —     —     17,000  
   
 
 
 
    Total costs and expenses     98,579     92,181     97,589  
   
 
 
 
Operating income (loss)     19,486     13,834     (5,290 )
Other income (expense)                    
  Interest income     1,891     1,408     722  
  Interest expense     (736 )   (757 )   (808 )
  Other income (expense)     (117 )   545     49  
   
 
 
 
    Total other income (expense)     1,038     1,196     (37 )
   
 
 
 
  Income (loss) from continuing operations before provision (benefit) for income taxes     20,524     15,030     (5,327 )
  Provision (benefit) for income taxes     6,893     (5,891 )   3,000  
   
 
 
 
Income (loss) from continuing operations     13,631     20,921     (8,327 )
Gain (loss) from discontinued operations, net of taxes     —     797     (932 )
   
 
 
 
Net income (loss)   $ 13,631   $ 21,718   $ (9,259 )
   
 
 
 
Basic earnings (loss) per share:                    
  Continuing operations   $ 0.43   $ 0.63   $ (0.26 )
  Discontinued operations     —     0.02     (0.03 )
  Net income (loss)     0.43     0.66     (0.28 )
Diluted earnings (loss) per share:                    
  Continuing operations   $ 0.41   $ 0.61   $ (0.26 )
  Discontinued operations     —     0.02     (0.03 )
  Net income (loss)     0.41     0.63     (0.28 )
Shares used in basic per share calculations     32,028     32,985     32,525  
Shares used in diluted per share calculations     32,996     34,367     32,525  

See accompanying notes.

F-3


QUIDEL CORPORATION

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

 
   Common Stock
    
    
    
    
    
  
 
    
   Accumulated
other
comprehensive
income (loss)
    
    
    
  
 
   Shares
   Amount
   Additional
paid-in capital
   Deferred
stock
compensation
   Accumulated
deficit
   Total
stockholders'
equity
   Total
comprehensive
income (loss)
  
 
   (in thousands)

  
Balance at December 31, 2004   31,848   $ 32   $ 153,319   $ —   $ 1,407   $ (64,573 ) $ 90,185   $ (6,079 )
Issuance of common stock for cash under stock options and stock purchase plans   1,421     1     6,068     —     —     —     6,069        
Deferred stock compensation relating to restricted stock   610     1     2,757     (2,757 )   —     —     1        
Cancellation of restricted stock compensation   (30 )   —     (130 )   130     —     —     —        
Amortization of deferred stock compensation   —     —     —     680     —     —     680        
Translation adjustment   —     —     —     —     (81 )   —     (81 )   (81 )
Purchase of common stock   (71 )         (352 )                     (352 )      
Net loss   —     —     —     —     —     (9,259 )   (9,259 )   (9,259 )
   
 
 
 
 
 
 
 
 
Balance at December 31, 2005   33,778     34     161,662     (1,947 )   1,326     (73,832 )   87,243   $ (9,340 )
                                           
 
Issuance of common stock under equity compensation plans   998     1     3,697     —     —     —     3,698        
Income tax benefit due to exercise/disposition of employee stock options   —     —     111     —     —     —     111        
Cancellation of common stock under equity compensation plans   (24 )   —     —     —     —     —     —        
Reclassification due to adoption of SFAS 123R   —     —     (1,947 )   1,947     —     —     —        
Stock-based compensation expense   —     —     3,398     —     —     —     3,398        
Translation adjustment   —     —     —     —     (1,326 )   —     (1,326 )   (1,326 )
Purchase of common stock   (1,222 )   (2 )   (11,564 )   —     —     —     (11,566 )      
Net income   —     —     —     —     —     21,718     21,718     21,718  
   
 
 
 
 
 
 
 
 
Balance at December 31, 2006   33,530     33     155,357     —     —     (52,114 )   103,276   $ 20,392  
                                           
 
Issuance of common stock under equity compensation plans   957     1     2,792     —     —     —     2,792        
Cancellation of common stock under equity compensation plans   (192 )   —     (1 )   —     —     —     (1 )      
Income tax benefit due to exercise/disposition of employee stock options   —     —     1,033     —     —     —     1,033        
Stock-based compensation expense   —     —     4,117     —     —     —     4,117        
Purchase of common stock   (1,589 )   (1 )   (17,858 )   —     —     —     (17,858 )      
Cumulative effect to prior year accumulated deficit related to the adoption of FIN 48   —     —     —     —     —     713     713        
Net income   —     —     —     —     —     13,631     13,631     13,631  
   
 
 
 
 
 
 
 
 
Balance at December 31, 2007   32,706   $ 33   $ 145,440   $ —   $ —   $ (37,770 ) $ 107,703   $ 13,631  
   
 
 
 
 
 
 
 
 

See accompanying notes.

F-4

QUIDEL CORPORATION

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Continued)


QUIDEL CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS

 
   Year ended December 31,
  
 
   2007
   2006
   2005
  
 
   (in thousands)

  
OPERATING ACTIVITIES                    
Net income (loss)   $ 13,631   $ 21,718   $ (9,259 )
Adjustments to reconcile net income (loss) to net cash provided by operating activities:                    
  Depreciation and amortization     9,852     9,109     5,466  
  (Gain) loss on discontinued operations     —     (797 )   932  
  Foreign currency translation     —     (558 )   —  
  Loss on disposal of assets     126     16     66  
  Stock-based compensation expense     4,117     3,398     680  
  Change in deferred tax asset     5,523     (6,078 )   2,887  
  Excess tax benefit from share-based compensation     (1,033 )   (111 )   —  
  Changes in assets and liabilities:                    
    Accounts receivable     (5,024 )   (2,320 )   (545 )
    Inventories     (1,412 )   (1,125 )   (860 )
    Prepaid expenses and other current assets     101     (336 )   152  
    Accounts payable     769     (1,302 )   842  
    Accrued payroll and related expenses     (527 )   963     2,124  
    Accrued royalties     (270 )   192     1,162  
    Deferred revenue     —     —     (1,629 )
    Accrued income taxes payable     1,053     —     —  
    Other current liabilities     436     (2,038 )   (617 )
   
 
 
 
  Net cash provided by continuing operations     27,342     20,731     1,401  
  Net cash used by discontinued operations     —     —     (179 )
   
 
 
 
  Net cash provided by operating activities     27,342     20,731     1,222  
   
 
 
 
INVESTING ACTIVITIES                    
  Acquisition of plant and equipment     (3,109 )   (4,469 )   (3,157 )
  Acquisition of intangible assets     (640 )   (6,500 )   (4,300 )
  Other assets     (21 )   308     (211 )
   
 
 
 
  Net cash used for investing activities     (3,770 )   (10,661 )   (7,668 )
   
 
 
 
FINANCING ACTIVITIES                    
  Proceeds from issuance of common stock, net     2,792     3,697     5,717  
  Excess tax benefit from share-based compensation     1,033     111     —  
  Payments on debt and obligations under capital leases     (675 )   (648 )   (590 )
  Purchase of common stock     (17,858 )   (11,564 )   —  
   
 
 
 
  Net cash provided by (used for) financing activities     (14,708 )   (8,404 )   5,127  
   
 
 
 
Effect of exchange rate changes on cash     —     29     (73 )
   
 
 
 
Net increase (decrease) in cash and cash equivalents     8,864     1,695     (1,392 )
Cash and cash equivalents at beginning of year     36,625     34,930     36,322  
   
 
 
 
Cash and cash equivalents at end of year   $ 45,489   $ 36,625   $ 34,930  
   
 
 
 
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION                    
  Cash paid for interest   $ 736   $ 757   $ 808  
   
 
 
 
  Cash paid for income taxes   $ 362   $ —   $ —  
   
 
 
 
NON-CASH INVESTING ACTIVITIES                    
Purchase of license agreements by incurring current liabilities   $ 560   $ —   $ 2,800  
   
 
 
 
Purchase of capital equipment by incurring current liabilities     1,017   $ —   $ —  
   
 
 
 

See accompanying notes.

F-5

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

Note 1. Company Operations and Summary of Significant Accounting Policies

        Quidel Corporation (the "Company") commenced operations in 1979. The Company operates in one business segment, which develops, manufactures and markets point-of-care ("POC") rapid diagnostics for detection and management of a variety of medical conditions and illnesses. The majority of the Company's products are specifically developed for the physician office lab and acute care market and are substantially focused on infectious diseases and reproductive and women's health. The Company's products are sold to professionals for use in physician offices, hospitals, clinical laboratories, retail clinics and wellness screening centers through a network of national and regional distributors, supported by a national sales force.

        Consolidation—The consolidated financial statements include the accounts of the Company and its wholly owned subsidiaries. All significant intercompany accounts and transactions have been eliminated.

        Reclassification—Certain amounts from the prior year have been reclassified to conform to the December 31, 2007 financial statement presentation.

        Cash and Cash Equivalents—The Company considers cash equivalents to be highly liquid investments with a maturity at the date of purchase of three months or less.

        Accounts Receivable—The Company sells its products primarily to distributors in the U.S., Europe and Japan. The Company periodically assesses the financial strength of these customers and establishes reserves for anticipated losses when necessary, which historically have not been material. The Company's reserves primarily consist of amounts related to cash discounts and contract rebates, and to a lesser extent returned good allowances and bad debts. The balance of accounts receivable is net of reserves of $0.9 million and $0.8 million at December 31, 2007 and 2006, respectively.

        Inventories—Inventories are stated at the lower of cost (first-in, first-out method) or market. The Company reviews the components of its inventory on a quarterly basis for excess, obsolete and impaired inventory and makes appropriate dispositions as obsolete stock is identified. Inventories consisted of the following, net of reserves of $0.5 million for year ended December 31, 2007 and $0.2 million for year ended December 31, 2006, (in thousands):

 
   December 31,
 
   2007
   2006
Raw materials   $ 5,361   $ 4,296
Work-in-process     2,896     2,692
Finished goods     2,780     2,637
   
 
    $ 11,037   $ 9,625
   
 

        Property, Plant and Equipment—Property, plant and equipment is recorded at cost and depreciated over the estimated useful lives of the assets (three to 15 years) using the straight-line method. Amortization of leasehold improvements is computed on the straight-line method over the shorter of the lease term or the estimated useful lives of the assets. The total expense for depreciation of fixed assets and amortization of leasehold improvements was $4.1 million, $4.0 million and $3.7 million for the years ended December 31, 2007, 2006 and 2005, respectively. The portion of this expense related to capital leases is $0.7 million, $0.6 million, and $0.6 million for the years ended December 31, 2007, 2006 and 2005, respectively. Maintenance and minor repairs are charged to operations as incurred.

F-6

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 1. Company Operations and Summary of Significant Accounting Policies (Continued)


When assets are sold, or otherwise disposed of, the cost and related accumulated depreciation are removed from the accounts and any gain or loss is included in Other Income (Expense) in the Consolidated Statements of Operations.

        Property, plant and equipment consisted of the following (in thousands):

 
   December 31,
  
 
   2007
   2006
  
Equipment, furniture and fixtures   $ 34,733   $ 35,762  
Building and improvements     18,997     18,744  
Land     1,080     1,080  
   
 
 
      54,810     55,586  
Less: Accumulated depreciation and amortization     (34,884 )   (35,528 )
   
 
 
    $ 19,926   $ 20,058  
   
 
 

        Intangible Assets—Intangible assets are recorded at cost and amortized, except for indefinite-lived intangibles such as goodwill, on a straight-line basis over their estimated useful lives. Intangible assets consisted of the following (in thousands):

 
    
   December 31, 2007
   December 31, 2006
Description
   Weighted-
Average Life
   Gross Assets
   Accumulated Amortization
   Net
   Gross Assets
   Accumulated Amortization
   Net
Goodwill   NA   $ 9,918     (3,448 ) $ 6,470   $ 9,918   $ (3,448 ) $ 6,470
Purchased technology   7.0     6,100     (6,100 )   —     6,100     (5,231 )   869
License agreements   4.0     17,500     (10,633 )   6,867     16,300     (6,383 )   9,917
Patent and trademark costs   3.0     3,623     (3,020 )   603     3,623     (2,641 )   982
Favorable lease   16.0     1,700     (1,320 )   380     1,700     (1,141 )   559
       
 
 
 
 
 
        $ 38,841   $ (24,521 ) $ 14,320   $ 37,641   $ (18,844 ) $ 18,797
       
 
 
 
 
 

        Amortization expense was $5.5 million, $4.6 million and $1.5 million for the years ended December 31, 2007, 2006 and 2005, respectively. Intangible assets include a $6.5 million addition of an acquired license in October of 2006. During the fourth quarter of 2006, goodwill was reduced by $6.6 million due to the removal of a valuation allowance on deferred tax assets related to net operating losses of acquired companies.

F-7

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 1. Company Operations and Summary of Significant Accounting Policies (Continued)

        The expected future annual amortization expense of the Company's intangible assets is as follows (in thousands):

Years Ended December 31,
   Amortization Expense
2008   $ 4,526
2009     1,376
2010     1,357
2011     344
2012     143
Thereafter     104
   
Total   $ 7,850
   

        The Company completed its annual evaluation for impairment of goodwill as of December 31, 2007 and determined that no impairment of goodwill existed. A significant decline in the Company's projected revenue or earnings growth or cash flows, a significant decline in the Company's stock price or the stock price of comparable companies, loss of legal ownership or title to an asset, and any significant change in the Company's strategic business objectives and utilization of assets are among many factors that could result in an impairment charge that could have a material negative impact on the Company's operating results.

        Impairment of Long-Lived Assets—The Company reviews long-lived assets for impairment whenever events or changes in circumstances indicate that the total book value of an asset may not be recoverable. An impairment loss is recognized when estimated undiscounted future cash flows expected to result from the use of the asset and the eventual disposition are less than its carrying amount. An impairment loss is equal to the excess of the book value of an asset over its determined fair value. See "Discontinued Operations" in Note 9 below.

        Other current liabilities—Other current liabilities consisted of the following (in thousands):

 
   December 31,
 
   2007
   2006
Volume discounts payable   $ 1,200   $ 596
State and foreign taxes payable     701     688
Amounts due on technology and license acquisitions     560     —
Accrued professional fees     285     213
Other     216     175
   
 
    $ 2,962   $ 1,672
   
 

        Revenue Recognition—The Company records revenues primarily from product sales. These revenues are recorded net of rebates and other discounts which are estimated at the time of sale, and are largely driven by various customer program offerings, including special pricing agreements, promotions and other volume-based incentives. Revenue from product sales are recorded upon passage of title and risk of loss to the customer. Change in title to the product and recognition of revenue occurs upon delivery to the customer when sales terms are free on board ("FOB") destination and at the time of shipment

F-8

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 1. Company Operations and Summary of Significant Accounting Policies (Continued)


when the sales terms are FOB shipping point and there is no right of return. The Company also earns income from the licensing of technology and has previously earned income from performing services under a joint development agreement. Royalty income from the grant of license rights is recognized during the period in which the revenue is earned and the amount is determinable from the licensee. Milestone payments, arising under joint development agreements, were previously recognized when earned, as evidenced by written acknowledgment from the collaborator or other persuasive evidence that the milestone had been achieved, provided that (i) the milestone event was substantive and its achievability was not reasonably assured at the inception of the agreement, and (ii) the Company's performance obligations after the milestone achievement would continue to be funded by the collaborator at a level comparable to before the milestone achievement. If both of these criteria were not met, the milestone payment would be recognized over the remaining minimum period of the Company's performance obligations under the agreement. Income earned from licensing activities is a component of total revenues in the accompanying Consolidated Statements of Operations.

        Research and Development Costs—All research and development costs are charged to operations as incurred.

        Product Shipment Costs—Product shipment costs are included in sales and marketing expense in the accompanying Consolidated Statements of Operations. Shipping and handling costs were $1.7 million, $1.5 million and $1.1 million for the years ended December 31, 2007, 2006 and 2005, respectively.

        Advertising Costs—Advertising costs are expensed as incurred. Advertising costs were $0.7 million, $0.5 million and $0.9 million for the years ended December 31, 2007, 2006 and 2005, respectively.

        Deferred Rent—Rent expense is recorded on a straight-line basis over the term of the lease. The difference between rent expense and amounts paid under the lease agreement is recorded as deferred rent.

        Income Taxes—Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes, using enacted tax rates in effect for the year in which the differences are expected to reverse. Valuation allowances are established, when necessary, to reduce deferred tax assets to the amount expected to be realized.

        Foreign Currency Translation—The financial statements of the Company's subsidiaries outside the U.S. are measured using the local currency as the functional currency. Assets and liabilities of these subsidiaries are translated at the rates of exchange at the balance sheet date and revenue and expense accounts are translated using average exchange rates during the periods. The resulting translation adjustments are presented as a separate component of stockholders' equity. Exchange gains and losses arising from transactions denominated in foreign currencies are recorded in operations and have historically not been significant.

        Fair Value of Financial Instruments—The carrying amounts of the Company's financial instruments, including cash, receivables, accounts payable, accrued liabilities and the line of credit, if any, approximate their fair values due to their short-term nature. Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of trade accounts receivable. The

F-9

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 1. Company Operations and Summary of Significant Accounting Policies (Continued)


Company establishes reserves for estimated uncollectible accounts and believes its reserves are adequate.

        Product Warranty—The Company generally sells products with a limited product warranty and certain limited indemnifications. The accrual and the related expense for known issues were not significant as of and for the fiscal years presented. Due to product testing, the short time between product shipment and the detection and correction of product failures and a low historical rate of payments on indemnification claims, the accrual based on historical activity and the related expense were not significant as of and for the fiscal years presented.

        Stock-Based Compensation—Prior to January 1, 2006, the Company accounted for share-based employee and director compensation, including stock options, using the method prescribed in Accounting Principles Board Opinion No. 25, "Accounting for Stock Issued to Employees" and related Interpretations (APB Opinion No. 25). Under APB Opinion No. 25, for stock options granted with an exercise price at or above market price, no compensation cost was recognized, and a disclosure was made regarding the pro forma effect on net income assuming compensation cost had been recognized in accordance with SFAS No. 123, "Accounting for Stock-Based Compensation." On December 16, 2004, the Financial Accounting Standards Board issued SFAS No. 123 (Revised 2004) "Share-Based Payment" ("SFAS No. 123(R)"), which requires companies to measure and recognize compensation expense for all share-based payments at fair value. SFAS No. 123(R) eliminates the ability to account for share-based compensation transactions using APB Opinion No. 25, and generally requires that such transactions be accounted for using prescribed fair-value-based methods. SFAS No. 123(R) permits public companies to adopt its requirements using one of two methods: (a) a "modified prospective" method in which compensation costs are recognized beginning with the effective date based on the requirements of SFAS No. 123(R) for all share-based payments granted or modified after the effective date, and based on the requirements of SFAS No. 123 for all awards granted to employees and directors prior to the effective date of SFAS No. 123(R) that remain unvested on the effective date, or (b) a "modified retrospective" method which includes the requirements of the modified prospective method described above, but also permits companies to restate based on the amounts previously recognized under SFAS No. 123 for purposes of pro forma disclosures either for all periods presented, or prior interim periods of the year of adoption. Effective January 1, 2006, the Company adopted SFAS No. 123(R) using the modified prospective method. Other than restricted stock, no share-based employee or director compensation cost has been reflected in net income prior to the adoption of SFAS No. 123(R). Results for prior periods have not been restated.

        Computation of Earnings (Loss) Per Share—Basic earnings per share were computed by dividing net earnings by the weighted-average number of common shares outstanding, including vested restricted stock awards, during the period. Diluted earnings per share reflects the potential dilution that could occur if the earnings were divided by the weighted-average number of common shares and potentially dilutive common shares from outstanding stock options as well as unvested restricted stock awards. Potential dilutive common shares were calculated using the treasury stock method and represent incremental shares issuable upon exercise of the Company's outstanding stock options and unvested restricted stock awards. The Company has awarded restricted stock with both service-based as well as performance-based vesting provisions. Stock awards based on performance only are not included in the calculation of basic earnings per share until the performance criteria are met. For periods in which we incur losses, potentially dilutive shares are not considered in the calculation of net loss per share as

F-10

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 1. Company Operations and Summary of Significant Accounting Policies (Continued)


their impact would be anti-dilutive. For periods in which we have earnings, out-of-the-money stock options (i.e., the average stock price during the period is below the exercise price of the stock option) are not included in diluted earnings per common share as their effect would be anti-dilutive.

        During the year ended December 31, 2007 and 2006, we had income from continuing operations. Accordingly, 0.3 million and 0.4 million shares of outstanding stock options were not included in the computation of diluted earnings per common share for 2007 and 2006, respectively, because the option exercise price was greater than the average market price of the common stock, and therefore, the effect on dilutive earnings per common share would be anti-dilutive. For the year ended December 31, 2005, we incurred losses from continuing operations. Potentially dilutive shares of 1.4 million were not considered in the calculation of net loss per share, as their impact would be anti-dilutive.

        The following table reconciles the weighted-average shares used in computing basic and diluted earnings (loss) per share in the respective periods (in thousands):

 
   Year ended December 31,
 
   2007
   2006
   2005
Shares used in basic earnings (loss) per share (weighted-average common shares outstanding)   32,028   32,985   32,525
Effect of dilutive stock options and restricted stock awards   968   1,382   —
   
 
 
Shares used in diluted earnings (loss) per share calculation   32,996   34,367   32,525
   
 
 

        Comprehensive Income (Loss)—Comprehensive income (loss) includes unrealized gains and losses excluded from the Company's Consolidated Statements of Operations. The unrealized losses include foreign currency translation adjustments. The Company has presented the required information in the Consolidated Statements of Stockholders' Equity.

        Use of Estimates—The preparation of financial statements in conformity with accounting principles generally accepted in the U.S. requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosures of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

        New Accounting Standards—Effective January 1, 2007, we adopted the provisions of Financial Accounting Standards Board ("FASB") Interpretation No. 48, "Accounting for Uncertainty in Income Taxes" ("FIN 48").

        FIN 48 provides guidance for the recognition threshold and measurement attribute for financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. In accordance with FIN 48, we recognized a cumulative-effect adjustment of $0.7 million, increasing the January 1, 2007 balance of retained income. See Note 3 for more information on income taxes.

        Accounting Periods—The Company's first, second and third fiscal quarters end on the Sunday closest to March 31, June 30 and September 30, respectively. The Company's fiscal year end is December 30. For ease of reference, the calendar quarter end date is used herein.

F-11

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 2. Line of Credit

        The Company currently has a $30.0 million credit facility (the "Senior Credit Facility"), which matures on June 30, 2009. The Senior Credit Facility bears interest at a rate ranging from 0% to 0.75% plus the lender's prime rate or, at our option, a rate ranging from 0.75% to 1.75% plus the London InterBank Offering Rate. The agreement governing the Company's Senior Credit Facility also contains certain customary covenants restricting our ability to, among other matters, incur additional indebtedness, create liens or other encumbrances, pay dividends or make other restricted payments, make investments, loans and guarantees or sell or otherwise dispose of a substantial portion of assets to, or merge or consolidate with, another entity. The terms of the Senior Credit Facility require the Company to comply with certain financial covenants, including: a minimum net worth, a maximum ratio of debt drawn under the Senior Credit Facility to earnings before interest, taxes, depreciation and amortization ("EBITDA") and a fixed charge coverage ratio. As of December 31, 2007, the Company had $30.0 million of availability under the Senior Credit Facility and the Company was in compliance with all covenants.

Note 3. Income Taxes

        The Company's income (loss) from continuing operations before provision (benefit) for income taxes were subject to taxes in the following jurisdictions for the following periods (in thousands):

 
   December 31,
  
 
   2007
   2006
   2005
  
United States   $ 20,628   $ 14,524   $ (5,272 )
Foreign     (104 )   506     (55 )
   
 
 
 
    $ 20,524   $ 15,030   $ (5,327 )
   
 
 
 

        Significant components of the provision (benefit) for income taxes from continuing operations are as follows (in thousands):

 
   December 31,
 
   2007
   2006
   2005
Current:                  
  Federal   $ 310   $ 181   $ —
  State     1,017     113     113
   
 
 
  Total current provision     1,327     294     113
Deferred:                  
  Federal     6,325     (5,072 )   2,368
  State     (759 )   (1,113 )   519
   
 
 
  Total deferred provision (benefit)     5,566     (6,185 )   2,887
   
 
 
Provision (benefit) for income taxes   $ 6,893   $ (5,891 ) $ 3,000
   
 
 

F-12

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 3. Income Taxes (Continued)

        Significant components of the Company's deferred tax assets as of December 31, 2007 and 2006 are shown below (in thousands).

 
   December 31,
  
 
   2007
   2006
  
Deferred tax assets:              
  Net operating loss carryforwards   $ 1,288   $ 9,273  
  Capitalized research and development costs     4,320     4,946  
  Tax credit carryforwards     3,216     1,828  
  Depreciation     1,017     296  
  Other, net     8,037     5,670  
   
 
 
Total deferred tax assets     17,878     22,013  
Deferred tax liabilities:              
  Acquired intangibles     —     (358 )
   
 
 
  Net deferred tax assets   $ 17,878   $ 21,655  
   
 
 

        A valuation allowance of $18.2 million had been established against a portion of the Company's deferred tax assets at December 31, 2005. As of December 31, 2006, the Company believed it was more likely than not that it would be able to realize its deferred tax asset through expected future taxable profits, and released a valuation allowance of approximately $18.2 million of which $11.6 million was recognized as an income tax benefit and $6.6 million reduced the existing value of goodwill. The amount of the net deferred tax assets considered realizable, however, could be reduced in the near term if actual future income or income tax rates are lower than estimated, or if there are differences in the timing or amount of future reversals of existing taxable or deductible temporary differences.

        The Company will continue to assess the assumptions used to determine the valuation allowance. Should the Company determine that it would not be able to realize all or part of its other components of the deferred tax asset in the future, an adjustment to the deferred tax asset would be charged to income in the period such determination were made.

        As a result of the adoption of SFAS No. 123(R) the Company will recognize excess tax benefits associated with the exercise of stock options directly to stockholders' equity only when realized. Accordingly, deferred tax assets are not recognized for net operating loss ("NOL") carryforwards resulting from excess tax benefits. As of December 31, 2007 and 2006, deferred tax assets do not include $7.1 million and $6.0 million, respectively, of these excess tax benefits from employee stock option exercises that are a component of the Company's net operating loss carryforwards. Additional paid-in capital will be increased up to an additional $7.1 million if such excess tax benefits are realized.

        As of December 31, 2007, the Company had federal NOL carryforwards of approximately $24.7 million which will expire at various dates through December 31, 2025, unless previously utilized. The Company has state NOL carryforwards of $10.9 million. None of the state NOL carryforwards are scheduled to expire during 2008. The balance of the state NOL carryforwards will expire at various dates through 2015. The Company has gross federal and state research credits for the year ended December 31, 2007 and 2006 of $1.4 million and $4.3 million, respectively. The federal credits begin to expire in 2012 and the state credits do not expire. The Company also has an alternative minimum tax credit of $1.3 million that does not expire.

F-13

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 3. Income Taxes (Continued)

        Pursuant to Internal Revenue Code Sections 382 and 383, the Company's use of its NOL and research credit carryforwards may be limited as a result of cumulative changes in ownership of more than 50% over a three-year period.

        The reconciliation of income tax computed at the federal statutory rate to the provision (benefit) for income taxes from continuing operations is as follows (in thousands):

 
   Year ended December 31,
  
 
   2007
   2006
   2005
  
Tax expense (benefit) at statutory tax rate   $ 6,978   $ 5,110   $ (1,811 )
Permanent differences     291     462     —  
Federal and state research credits—current year     (655 )   (458 )   (397 )
Federal and state research credits—prior year true-up     (765 )   1,235     (294 )
FIN 48 accrual     288     —     —  
Foreign taxes and foreign (income) losses not benefited (taxed)     35     (194 )   19  
State taxes (benefit), net of federal tax (benefit)     993     735     (234 )
Federal and state NOL change related to Section 382     —     (1,103 )   1,372  
Change in valuation allowance     —     (11,612 )   4,289  
Other     (272 )   (66 )   56  
   
 
 
 
    $ 6,893   $ (5,891 ) $ 3,000  
   
 
 
 

        The Company adopted FIN 48 on January 1, 2007 and recognized a cumulative-effect adjustment of $0.7 million, increasing retained earnings.

        The following table summarizes the activity related to our unrecognized tax benefits (in thousands):

Balance as of January 1, 2007   $ 6,006  
Increases related to prior year tax positions     31  
Increases related to current year tax provisions     310  
Decreases due to settlements     (182 )
Expiration of the statute of limitations for the assessment of taxes     —  
Other     —  
   
 
    $ 6,165  
   
 

        Included in the unrecognized tax benefits of $6.2 million as of December 31, 2007 was $5.0 million of tax benefits that, if recognized, would reduce our annual effective tax rate. The Company does not expect the unrecognized tax benefits to change significantly over the next 12 months. The Company's policy is to recognize the interest expense and penalties related to income tax matters as a component of income tax expense. The Company has accrued an immaterial amount of interest and penalties associated with uncertain tax positions as of December 31, 2007.

        The Company is subject to periodic audits by domestic and foreign tax authorities. The Company's tax years for 1993 and forward are subject to examination by the U.S. authorities due to the carryforward of unutilized net operating losses and research and development credits. With few exceptions, the Company's tax years 1999 and forward are subject to examination by state and foreign

F-14

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 3. Income Taxes (Continued)


authorities. The Company believes it has appropriate support for the income tax positions taken on its tax returns and that its accruals for tax liabilities are adequate for all open years based on an assessment of many factors, including past experience and interpretations of tax law applied to the facts of each matter.

Note 4. Stockholders' Equity

        Preferred Stock.    The Company's certificate of incorporation, as amended, authorizes the issuance of up to five million preferred shares. The Board of Directors is authorized to fix the number of shares of any series of preferred stock and to determine the designation of such shares. However, the amended certificate of incorporation specifies the initial series and the rights of that series. No shares of preferred stock were outstanding as of December 31, 2007 and 2006.

        Stockholder Rights Plan.    The Board of Directors of the Company adopted a Stockholder Rights Plan, effective December 31, 1996 and as amended and restated, effective May 24, 2002 and then again on December 29, 2006 (the "Rights Plan"), which provides for a dividend of one right (a "Right") to purchase fractions of shares of the Company's Series C Junior Participating Preferred Stock for each share of the Company's common stock. Under certain conditions involving an acquisition by any person or group of 15% or more of the common stock, the Rights permit the holders (other than the 15% holder) to purchase the Company's common stock at a 50% discount upon payment of an exercise price of $24 per Right. In addition, in the event of certain business combinations, the Rights permit the purchase of the common stock of an acquiror at a 50% discount. Under certain conditions, the Rights may be redeemed by the Board of Directors in whole, but not in part, at a price of $.005 per Right. The Rights have no voting privileges and are attached to and automatically trade with the Company's common stock. The Rights shall expire on December 31, 2011, unless earlier triggered, redeemed or exchanged.

        Restricted Stock.    For the year ended December 31, 2007, the Company granted approximately 0.4 million shares of restricted common stock to officers and management, including 0.1 million shares for which restrictions lapse 25% each year over a four-year period and 0.3 million shares of that are performance-based and are tied to the achievement of three-year performance goals; restrictions lapse at the end of the three-year period depending upon the Company's achievement of predetermined revenue and EBITDA goals. For the year ended December 31, 2006, the Company granted approximately 0.3 million shares of restricted common stock to officers and management. The shares of restricted stock awarded to officers during 2006 are all performance-based and remain subject to forfeiture until the restrictions covering such restricted shares lapse. The lapse of restrictions covering two-thirds of the total number of shares of these restricted shares (the "2006 Annual Shares") is tied to the achievement of annual performance targets for the Company over a three-year period. Assuming the officer remains employed by the Company on the relevant date, restrictions lapse on one-third of these 2006 Annual Shares each year on the anniversary of the grant date in 2006, 2007 and 2008 upon the Company's achievement of the annual goals set by the Company's Board of Directors with respect to revenue, EBITDA and a key strategic imperative for the Company in each of the fiscal years ending in 2006, 2007 and 2008. The lapse of restrictions on the remaining one-third of the total number of shares of these restricted shares is tied to the Company's achievement of a three-year EBITDA goal, as determined by the Board of Directors, with restrictions lapsing on the third anniversary of the grant date if such EBITDA goal is achieved. The remaining shares granted to management were service-

F-15

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 4. Stockholders' Equity (Continued)


based and vest over four years. For the year ended December 31, 2005, the Company granted approximately 0.5 million of restricted common stock to officers, directors and other management. The restrictions on the restricted stock granted to the Company's officers during 2005 lapse as follows: (i) restrictions covering one-half of the shares will lapse 25% each year over a four-year period commencing with the grant date; and (ii) the restrictions covering the remaining one-half of the shares have a four-year cliff provision with the possibility for acceleration of the removal of restrictions for 25% of this half of the grant annually upon the achievement of certain annual revenue, EBITDA and strategic goals set by the Board of Directors. The restrictions on restricted stock granted to the Company's officers during 2004 lapse ratably over four years, while all restrictions on the restricted stock granted to the Company's directors lapse over a one-year period.

        Until the restrictions lapse, ownership of the affected shares of restricted stock granted to the Company's officers is conditional upon continuous employment with the Company. During the restricted period, holders of restricted stock have full voting rights with respect to their shares of restricted stock, even though the restricted stock remains subject to transfer restrictions and generally is subject to forfeiture upon termination of employment or service. If an officer or director terminates service before the restrictions lapse, the restricted stock may be repurchased by the Company from the individual and any compensation expense previously recognized would be reversed, thereby reducing the amount of stock-based compensation expense during that period.

        Restricted Stock Units.    During the year ended December 31, 2007, restricted stock units were granted to certain members of the Board of Directors in lieu of cash compensation as a part of the Company's non-employee director's deferred compensation program. The compensation expense associated with the grant of restricted stock units was $0.2 million for the year ended December 31, 2007.

        Stock Options.    The Company grants options to employees and non-employee directors under its Amended and Restated 2001 Equity Incentive Plan (the "2001 Plan") and previously granted options under the 1998 Stock Incentive Plan and the 1996 Non-Employee Directors Stock Option Plan. The 1998 and 1996 Plans were terminated at the time of adoption of the 2001 Plan, but the terminated Plans continue to govern outstanding options granted thereunder. The Company has stock options outstanding which were issued under those various equity incentive plans to certain employees and directors, which have terms ranging up to 10 years, have exercise prices ranging from $2.25 to $19.48, and generally vest over four years. As of December 31, 2007, 2.3 million shares remained available for grant under the 2001 Plan.

        Employee Stock Purchase Plan.    Under the Company's 1983 Employee Stock Purchase Plan (the "ESPP"), full-time employees are allowed to purchase common stock through payroll deductions (which cannot exceed 10% of the employee's compensation) at the lower of 85% of fair market value at the beginning or end of each six-month option period. As of December 31, 2007, 846,961 shares had been sold under the Plan, leaving 152,883 shares available for future issuance.

        Share Repurchase Program.    In May 2005, the Company's Board of Directors authorized the Company to repurchase up to $25.0 million in shares of its common stock. Shares of the Company's common stock repurchased under this program will no longer be deemed outstanding upon repurchase and will be returned to the pool of authorized shares. This repurchase program will expire no later than March 9, 2009 unless extended by the Board of Directors. In March 2007, the Company's Board

F-16

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 4. Stockholders' Equity (Continued)


of Directors authorized the Company to repurchase up to an additional $25 million in shares of the Company's common stock under this program. As of December 31, 2007, the Company had repurchased approximately 2.8 million shares under this program, at a cost of approximately $28.6 million. Shares Reserved for Future Issuance. At December 31, 2007, approximately 4.0 million shares of common stock were reserved under the Company's equity incentive plans, and 0.2 million were reserved for purchases under the ESPP.

Note 5. Stock-Based Compensation

        Prior to January 1, 2006, the Company followed APB Opinion No. 25, and related Interpretations, in accounting for its employee and director stock options. Under APB No. 25, because the exercise price of the Company's employee and director stock options equaled or exceeded the estimated market price of the underlying stock on the date of grant, no compensation expense was recognized.

        Effective January 1, 2006, the Company began recording compensation expense associated with stock options in accordance with SFAS No. 123(R). The Company has adopted the modified prospective transition method provided under SFAS No. 123(R) and, as a result, has not retroactively adjusted results from prior periods. Under this transition method, compensation expense associated with stock options recognized in the fiscal year 2006 and 2007 includes: 1) expense related to the remaining unvested portion of all stock option awards granted prior to January 1, 2006, based on the grant-date fair value estimated in accordance with the original provisions of SFAS No. 123; and 2) expense related to all stock option awards granted during fiscal year 2006 based on the grant-date fair value estimated in accordance with the provisions of SFAS No. 123(R).

        The Company's net income for the year ending December 31, 2007 includes $2.4 million and $1.7 million of compensation expense related to stock option awards ("stock options") and restricted stock awards ("stock awards"), respectively. The compensation expense related to the Company's stock-based compensation plans is included in the statement of income for the year ended December 31, 2007 as follows: cost of sales of $0.4 million, research and development of $0.6 million, sales and marketing of $0.2 million and general and administrative of $2.9 million. The adoption of FAS No. 123(R) decreased net income for the year ended December 31, 2007 by approximately $2.4 million. As a result, basic and diluted earnings per share for the year ended December 31, 2007 were reduced by $0.08 and $0.07 per share, respectively.

        The Company's net earnings for the year ending December 31, 2006 includes $2.1 million and $1.3 million of compensation expense related to stock option awards ("stock options") and restricted stock awards ("stock awards"), respectively. The compensation expense related to the Company's stock-based compensation plans is included in the statement of operations for the year ended December 31, 2006 as follows: cost of sales of $0.3 million, research and development of $0.6 million, sales and marketing of $0.5 million and general and administrative of $2.0 million. The adoption of FAS No. 123(R) decreased net earnings for the year ended December 31, 2006 by approximately $2.1 million. As a result, basic and diluted earnings per share for the year ended December 31, 2006 were reduced by $0.06 per share.

        As previously announced, the Company's former Chief Financial Officer, Paul E. Landers, retired from the Company effective March 31, 2007. In December 2006, the Company entered into an employment agreement with Mr. Landers in which the vesting on a portion of his outstanding equity grants were accelerated as of his retirement date. This required modification of the accounting for

F-17

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 5. Stock-Based Compensation (Continued)

these grants under SFAS No. 123(R) and resulted in stock compensation expense of approximately $0.4 million during the first quarter of 2007.

        Compensation costs capitalized to inventory and compensation expense related to the Company's ESPP were not material for the year ended December 31, 2007.

Stock Options

        Compensation expense related to stock options granted is recognized ratably over the service vesting period for the entire option award. The total number of stock option awards expected to vest is adjusted by estimated forfeiture rates. The estimated fair value of each stock option award was determined on the date of grant using the Black-Scholes option valuation model with the following weighted-average assumptions for the option grants:

 
   Year ended December 31,
  
 
   2007
   2006
   2005
  
Risk-free interest rate   4.54 % 4.64 % 4.4 %
Expected option life (in years)   4.72   4.55   4.6  
Volatility   0.67   0.75   0.80  
Dividend Rate   0 % 0 % 0 %

        The computation of the expected option life is based on a weighted-average calculation combining the average life of options that have already been exercised and post-vest cancellations with the estimated life of the remaining vested and unexercised options. The expected volatility is based on the historical volatility of the Company's stock. The risk-free interest rate is based on the U.S. Treasury yield curve over the expected term of the option. The Company has never paid cash dividends on its common stock and does not anticipate paying cash dividends in the foreseeable future. Consequently, the Company uses an expected dividend yield of zero in the Black-Scholes option valuation model. The Company's estimated forfeiture rate is based on its historical experience.

        The Company's determination of fair value is affected by the Company's stock price as well as a number of assumptions that require judgment. The weighted-average fair value per share was $8.82, $6.76 and $3.54 for options granted during the years ended December 31, 2007, 2006 and 2005, respectively. The total intrinsic value was $5.4 million, $5.0 million and $4.0 million for options exercised during the years ended December 31, 2007, 2006 and 2005, respectively. As of December 31, 2007, total unrecognized compensation cost related to stock options was approximately $2.9 million and the related weighted-average period over which it is expected to be recognized is approximately 2.0 years. The maximum contractual term of the Company's stock options is 10 years.

F-18

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 5. Stock-Based Compensation (Continued)

        A summary of the status of stock option activity for the year ended December 31, 2007 is as follows (in thousands, except price data and years):

 
   Number of Shares
   Weighted-average exercise price per share
   Weighted-
average remaining contractual term (in years)
   Aggregate intrinsic value
Outstanding at December 31, 2004   3,840     4.84          
Granted   291     5.45          
Exercised   (1,376 )   4.27          
Cancelled   (302 )   6.07          
   
 
         
Outstanding at December 31, 2005   2,453     5.09          
Granted   301     10.95          
Exercised   (666 )   5.13          
Cancelled   (54 )   7.81          
   
 
         
Outstanding at December 31, 2006   2,034   $ 5.87          
Granted   289     15.23          
Exercised   (495 )   5.19          
Cancelled   (99 )   7.43          
   
 
         
Outstanding at December 31, 2007   1,729   $ 7.55   6.84   $ 20,705
   
 
 
 
Vested and expected to vest at December 31, 2007   1,615   $ 7.22   6.72   $ 19,877
   
 
 
 
Exercisable at December 31, 2007   1,108   $ 5.71   6.03   $ 15,316
   
 
 
 
Available for future grant at December 31, 2007   2,304                
   
               

F-19

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 5. Stock-Based Compensation (Continued)

        The following table summarizes information about outstanding and exercisable options at December 31, 2007:

 
   Options Outstanding
   Options Exercisable
Range of Exercise Prices
   Options Outstanding
   Weighted-Average Remaining Contractual Life in Years
   Weighted-Average Exercise Price
   Options Exercisable
   Weighted-Average Exercise Price of Options Exercisable
$  2.25 - $  3.38   54,977   4.42   $ 3.13   54,977   $ 3.13
$  3.46 - $  3.46   450,000   6.64     3.46   365,625     3.46
$  3.97 - $  5.08   195,279   5.64     4.43   150,970     4.48
$  5.13 - $  5.85   272,127   5.60     5.70   234,627     5.68
$  6.01 - $  9.36   231,311   6.67     7.70   136,309     7.37
$  9.93 - $12.23   233,637   7.35     11.55   161,606     11.27
$13.09 - $13.97   179,266   9.14     13.57   4,000     13.09
$14.01 - $18.12   87,244   9.48     17.67   0     0
$18.18 - $18.18   20,000   9.93     18.18   0     0
$19.48 - $19.48   4,665   9.85     19.48   0     0
   
 
 
 
 
$  2.25 - $19.48   1,728,506   6.84   $ 7.55   1,108,114   $ 5.71
   
 
 
 
 

Stock Awards

        The fair value of stock awards is determined based on the closing market price of the Company's common stock on the grant date. Compensation expense for stock awards is measured at the grant date and recognized ratably over the vesting period. Stock awards granted in 2004 are service-based and lapse ratably over a four-year vesting period. For stock awards granted in 2005, vesting is based on both the service period as well as the achievement of the Company's performance goals. Meeting the performance goals for these awards allows for acceleration of a portion of the stock awards. A majority of the stock awards granted in 2006 and 2007 were performance-based and vesting is tied to achievement of the Company's goals. For purposes of measuring compensation expense, the amount of shares ultimately expected to vest is estimated at each reporting date based on management's expectations regarding the relevant performance criteria. A significant portion of the Company's stock grants contains performance-based criteria. The recognition of compensation expense associated with performance-based grants requires judgment in assessing the probability of meeting the performance goals, as well as defined criteria for assessing achievement of the performance-related goals. This may result in significant expense recognition in the period in which the performance goals are met or when achievement of the goals is deemed probable or may result in the reversal of previously recognized stock-based compensation expense if the performance criteria are deemed not probable of being met. The cumulative amount of stock-based compensation expense that has been recognized through December 31, 2007 related to stock awards with performance-related vesting criteria for which the performance criteria have not yet been met is $0.8 million. The measurement date of the performance-based stock grants takes place when the grant is authorized and the specific achievement goals are communicated. The communication date of the performance goals can impact the valuation and associated expense of the stock grant.

F-20

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 5. Stock-Based Compensation (Continued)

        A summary of the status of stock awards activity for the year ended December 31, 2007 is as follows (in thousands, except price data):

 
   Shares
   Weighted-Average Grant Date Fair Value
Nonvested at January 1, 2005   41   $ 6.68
Granted   539     4.36
Vested   (27 )   6.26
Forfeited   —     —
   
     
Nonvested at December 31, 2005   553   $ 4.44
Granted   160 *   12.05
Vested   (198 )   4.55
Forfeited   (24 )   6.90
   
     
Nonvested at December 31, 2006   491   $ 6.76
Granted   438     11.97
Vested   (182 )   7.01
Forfeited   (192 )   9.62
   
     
Nonvested at December 31, 2007   555   $ 7.75
   
     

        Stock-based compensation expense related to stock awards outstanding was approximately $1.7 million, $1.3 million, and $0.6 million during the years ended December 31, 2007, 2006 and 2005, respectively. As part of the adoption of FAS No. 123(R), the deferred compensation costs of $1.9 million at December 31, 2005 were reclassified as a reduction of additional paid-in capital beginning January 1, 2006. The total amount of unrecognized compensation cost related to nonvested stock awards as of December 31, 2007 was approximately $3.7 million, which is expected to be recognized over a weighted-average period of approximately 1.9 years, if all performance-based criteria are met.

F-21

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 5. Stock-Based Compensation (Continued)

        The pro forma impact to net loss as if the fair value-based method had been applied to all stock options and stock awards for the years ended December 31, 2005 is as follows (in thousands, except per share amounts):

 
   Year ended December 31, 2005
  
Net loss, as reported   $ (9,259 )
Add: Stock-based compensation expense included in reported net loss, net of related tax effects     595  
Deduct: Stock-based compensation expense determined under fair value-based method for all awards, net of related tax effects     (2,786 )
   
 
Pro forma net loss   $ (11,450 )
   
 
Basic and diluted loss per share—as reported   $ (0.28 )
   
 
Basic and diluted loss per share—pro forma   $ (0.35 )
   
 

Note 6. Commitments and Contingencies

        The Company leases its facilities and certain equipment. Commitments for minimum rentals under non-cancelable leases at the end of 2007 are as follows (in thousands):

 
   Operating Leases
   Capital Leases
  
Years ending December 31,              
2008   $ 830   $ 1,404  
2009     834     1,432  
2010     865     1,461  
2011     864     1,490  
2012     852     1,520  
Thereafter     1,663     3,132  
   
 
 
Total minimum lease payments   $ 5,908     10,439  
   
       
Less amount representing interest           (2,675 )
         
 
Present value of capital lease payments           7,764  
Less current portion           (764 )
         
 
Long-term obligations under capital leases         $ 7,000  
         
 

        At December 31, 2007, assets under capital leases included in property and equipment totaled $12.9 million with accumulated amortization of $8.7 million.

        Rent expense under operating leases totaled approximately $1.4 million for each of the years ended December 31, 2007, 2006 and 2005, respectively. In the fourth quarter of 2007, the Company entered into a new operating lease at its Santa Clara location, including extending the term of the lease through 2014.

F-22

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 6. Commitments and Contingencies (Continued)

        During December 1999, the Company completed a sale and leaseback transaction of its San Diego facility. The facility was sold for $15.0 million, of which $3.8 million was capital contributed by the Company. The Company's lease for its 78,000 square foot facility in San Diego, CA is for 15 years, with options to extend the lease for up to two additional five-year periods. The sale was an all cash transaction, netting the Company approximately $7.0 million. The Company is a 25% limited partner in the partnership that acquired the facility. The transaction was deemed a financing transaction under SFAS No. 98 "Accounting for Sales of Real Estate." As such, the assets sold remain on the books of the Company and will continue to be depreciated over the estimated useful life. The Company made lease payments of approximately $1.4 million for the year ended December 31, 2007 and $1.3 million for both of the years ended December 31, 2006 and 2005.

Contracts

        The Company has entered into various licensing agreements which require royalty payments based on specified product sales. These agreements encompass the majority of the Company's products, and range in expiration through 2019. In addition, as part of the Company's litigation settlement with Inverness Medical Innovations, Inc. ("IMA") in the first quarter of 2005, the Company entered into a royalty agreement with IMA during 2005 which requires ongoing royalty payments of 8.5% on the majority of the Company's current products. Royalty expenses, which are charged to cost of sales under these licensing agreements, totaled $9.4 million, $9.6 million and $7.1 million for the years ended December 31, 2007, 2006 and 2005, respectively. As of December 31, 2007 and 2006, $3.3 million and $3.6 million, respectively, were recorded as accrued royalties in the accompanying Consolidated Balance Sheets. During the fourth quarter of 2006, the Company entered into a cross-licensing agreement with another company and paid $6.5 million, which amount is being amortized on a straight-line basis through December 2008. The Company believes it will continue to incur substantial royalty expenses relating to future sales of its products.

Legal

        The Company is involved in litigation matters from time to time in the ordinary course of business. Management believes that all such current legal actions, in the aggregate, will not have a material adverse effect on the Company. The Company also maintains insurance, including coverage for product liability claims, in amounts which management believes appropriate given the nature of its business.

Note 7. Industry and Geographic Information

        The Company operates in one reportable segment. Sales to customers outside the U.S. totaled 14%, 20%, and 25% of total revenue for the years ended December 31, 2007, 2006 and 2005, respectively. As of December 31, 2007 and 2006, balances due from foreign customers, in U.S. dollars, were $4.0 million and $5.5 million, respectively.

F-23

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 7. Industry and Geographic Information (Continued)

        The Company had sales to individual customers in excess of 10% of total revenue, as follows:

 
   Year ended December 31,
  
 
   2007
   2006
   2005
  
Customer:              
A   21 % 18 % 18 %
B   19 % 17 % 14 %
C   6 % 13 % 17 %
D   6 % 11 % 14 %

        As of December 31, 2007 and 2006, accounts receivable from individual customers with balances due in excess of 10% of total accounts receivable totaled $12.0 million and $11.3 million, respectively.

The following presents long-lived assets (excluding intangible assets) and total revenue by geographic territory (in thousands):

 
   Long-lived assets
December 31,
   Total revenue year ended December 31,
 
   2007
   2006
   2005
   2007
   2006
   2005
United States operations                                    
  Domestic   $ 19,926   $ 20,058   $ 19,557   $ 102,075   $ 84,975   $ 69,431
  Foreign     —     —     —     15,990     21,040     22,868
Foreign operations     —     —     —     —     —     —
   
 
 
 
 
 
Total   $ 19,926   $ 20,058   $ 19,557   $ 118,065   $ 106,015   $ 92,299

Consolidated product revenue by disease state are as follows (in thousands):

 
   Year ended December 31,
 
   2007
   2006
   2005
Infectious disease   $ 75,896   $ 68,565   $ 54,299
Reproductive and women's health     28,130     25,699     25,865
Other     12,864     10,468     8,567
   
 
 
    $ 116,890   $ 104,732   $ 88,731
   
 
 

Note 8. Employee Benefit Plan

        The Company has a defined contribution 401(k) plan (the "401(k) Plan") covering all employees who are eligible to join the 401(k) Plan upon employment. Employee contributions are subject to a maximum limit by federal law. This Plan includes an employer match of 50% on the first 6% of pay contributed by the employee. The Company contributed approximately $0.5 million to the 401(k) Plan during the years ended December 31, 2007 and 2006 and $0.4 million for the year ended December 31, 2005.

F-24

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 9. Discontinued Operations

        In the accompanying financial statements, the Company's urinalysis and ultrasonometer businesses are reported as discontinued operations under SFAS No. 144. The Company discontinued all operations of its ultrasonometer business during the fourth quarter of 2004, and during the second quarter of 2005, the Company sold certain assets of the urinalysis business for $0.5 million. Accordingly, the operations of both businesses have been classified as discontinued operations in the statements of operations for all periods presented. During the fourth quarter of 2006, the Company finalized its open tax audits in Germany and recognized a non-cash gain on discontinued operations of approximately $0.8 million associated with certain remaining balance sheet credits of the urinalysis operation sold during 2005.

        During the fourth quarter of 2006, the Company recognized non-cash income of approximately $1.3 million associated with certain remaining balance sheet credits of its foreign entities. These amounts were recorded as a gain on discontinued operations of $0.8 million related to the prior divestiture of the Company's urinalysis business, and other income of $0.5 million related to the previous closure of other foreign operations.

F-25

QUIDEL CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

Note 10. Quarterly Financial Information (unaudited)

 
   First
Quarter
   Second
Quarter
   Third
Quarter
   Fourth
Quarter
   Total
Year
 
   (in thousands, except per share data)
2007                              
Total revenues   $ 33,934   $ 18,580   $ 27,570   $ 37,981   $ 118,065
Cost of sales     12,952     9,316     11,159     15,146     48,573
Total cost and expenses     26,191     21,742     23,829     26,817     98,579
Income (loss) from continuing operations     4,817     (1,712 )   2.420     8,106     13,631
Net income (loss)     4,817     (1,712 )   2,420     8,106     13,631
Basic earnings (loss) per share:                              
  Continuing operations     0.15     (0.05 )   0.08     0.25     0.43
  Net income (loss)     0.15     (0.05 )   0.08     0.25     0.43
Diluted earnings (loss) per share:                              
  Continuing operations     0.14     (0.05 )   0.07     0.25     0.41
  Net income (loss)     0.14     (0.05 )   0.07     0.25     0.41
2006                              
Total revenues   $ 27,050   $ 16,471   $ 23,720   $ 38,774   $ 106,015
Cost of sales     10,514     8,669     10,344     15,291     44,818
Total cost and expenses     21,868     20,679     21,721     27,913     92,181
Income (loss) from continuing operations     5,328     (4,049 )   2,143     17,499     20,921
Gain from discontinued operations, net of taxes     —     —     —     797     797
Net income (loss)     5,328     (4,049 )   2,143     18,296     21,718
Basic earnings (loss) per share:                              
  Continuing operations     0.16     (0.12 )   0.07     0.53     0.63
  Discontinued operations     0.00     0.00     0.00     0.02     0.02
  Net income (loss)     0.16     (0.12 )   0.07     0.56     0.66
Diluted earnings (loss) per share:                              
  Continuing operations     0.15     (0.12 )   0.06     0.51     0.61
  Discontinued operations     0.00     0.00     0.00     0.02     0.02
  Net income (loss)     0.15     (0.12 )   0.06     0.54     0.63

F-26


SCHEDULE II


QUIDEL CORPORATION

CONSOLIDATED VALUATION AND QUALIFYING ACCOUNTS

(in thousands)

 
   Additions
    
    
Description
   Balance at
beginning
of period
   Charges to
costs and
expenses(1)
   Charges to
other
accounts
   Deductions(2)
   Balance at
end of
period
Year ended December 31, 2007:                            
  Accounts Receivable Allowance   $ 791   $ 855       $ 717   $ 929
Year ended December 31, 2006:                            
  Accounts Receivable Allowance   $ 1,082   $ 1,167       $ 1,458   $ 791
Year ended December 31, 2005:                            
  Accounts Receivable Allowance   $ 1,308   $ 1,693       $ 1,919   $ 1,082
(1)
The charges represent reductions to reserves associated primarily to accruals for early payment discounts and bad debt.

(2)
The deductions represent actual charges against the accrual described above.


EXHIBIT INDEX

Exhibit Number
   Description
3.1   Certificate of Incorporation, as amended. (Incorporated by reference to Exhibit 3.1 to the Registrant's Current Report on Form 8-K filed on February 26, 1991.)
3.2   Amended and Restated Bylaws. (Incorporated by reference to Exhibit 3.2 to the Registrant's Form 8-K dated November 8, 2000.)
4.1   Certificate of Designations of Series C Junior Participating Preferred Stock as filed with the State of Delaware on December 31, 1996 (Incorporated by reference to Exhibit 1(A) to the Registrant's Registration Statement on Form 8-A filed on January 14, 1997.)
4.2   Amended and Restated Rights Agreement dated as of December 29, 2006 between Quidel Corporation and American Stock Transfer and Trust Company, as Rights Agent. (Incorporated by reference to Exhibit 4.1 to the Registrant's Current Report on Form 8-K filed on January 5, 2007.)
10.1(1)   Registrant's 1983 Employee Stock Purchase Plan, as amended. (Incorporated by reference to Exhibit 10.6 to the Registrant's Form 10-Q filed on July 27, 2007.)
10.2(1)   Registrant's 1990 Employee Stock Option Plan. (Incorporated by reference to Exhibit 10.3 to the Registrant's Quarterly Report on Form 10-Q for the quarter ended September 30, 1990.)
10.3(1)   Registrant's 1996 Non-Employee's Director Plan. (Incorporated by reference to Registrant's Proxy Statement filed on September 27, 1996.)
10.4(1)   Registrant's 1998 Stock Incentive Plan. (Incorporated by reference to Exhibit 10.7 to the Registrant's Form 10-Q filed on July 27, 2007.)
10.5(1)   Registrant's Amended and Restated 2001 Equity Incentive Plan. (Incorporated by reference to Exhibit 10.1 to Registrant's Form 8-K filed on May 10, 2007.)
10.6(1)   Form of Restricted Stock/Stock Option Agreement used in connection with the Registrant's Amended and Restated 2001 Equity Incentive Plan. (Incorporated by reference to Exhibit 10.6 to the Registrant's Form 10-Q for the quarter ended September 30, 2004.)
10.7   Settlement Agreement effective April 1, 1997 between the Registrant and Becton, Dickinson and Company. (Incorporated by reference to Exhibit 10.18 to the Registrant's Form 10-K for the year ended March 31, 1997.)
10.8   Rosenstein License Agreement effective April 1, 1997 between the Registrant and Becton, Dickinson and Company. (Incorporated by reference to Exhibit 10.20 to the Registrant's Form 10-K for the year ended March 31, 1997.)
10.9   Settlement Agreement dated April 27, 2005 between the Registrant and Inverness Medical Innovations, Inc. (Incorporated by reference to Exhibit 10.1 to the Registrant's Form 8-K filed on May 3, 2005.)
10.10   Form of Purchase and Sale Agreement and Escrow Instructions. (Incorporated by reference to Exhibit 10.6 to the Registrant's Form 8-K filed on January 4, 2000.)
10.11   Form of Single Tenant Absolute Net Lease. (Incorporated by reference to Exhibit 10.7 to the Registrant's Form 8-K filed on January 4, 2000.)
10.12   Form of Indemnification Agreement—Corporate Officer and/or Director. (Incorporated by reference to Exhibit 10.1 to the Registrant's Form 8-K filed August 23, 2005.)
10.13 (1) Stock Option Agreement effective August 20, 2004 between the Registrant and Caren L. Mason. (Incorporated by reference to Exhibit 10.1 to the Registrant's Form 8-K filed on August 26, 2004.)
10.14 (1) Employment Agreement dated as of August 20, 2004 between the Registrant and Caren L. Mason. (Incorporated by reference to Exhibit 10.2 to the Registrant's Form 8-K filed on August 26, 2004.)
10.15 (1) Amendment of Employment Agreement dated December 31, 2007, between Quidel Corporation and Caren L. Mason. (Incorporated by reference to Exhibit 10.1 to the Registrant's Form 8-K filed on January 3, 2008.)

10.16 (1) Change in Control Agreement dated August 20, 2004, between the Registrant and Caren L. Mason. (Incorporated by reference to Exhibit 10.3 to the Registrant's Form 8-K filed on August 26, 2004.)
10.17 (1) Amendment of Agreement Re: Change in Control, dated December 31, 2007, between Quidel Corporation and Caren L. Mason. (Incorporated by reference to Exhibit 10.5 to the Registrant's Form 8-K filed on January 3, 2008.)
10.18 (1) Employment Offer Letter dated as of October 26, 2004 between Registrant and Thomas J. Foley, Ph.D. (Incorporated by reference to Exhibit 10.1 to the Registrant's Form 8-K filed on November 2, 2004.)
10.19 (1) Change in Control Agreement effective as of November 8, 2004 between Registrant and Thomas J. Foley, Ph.D. (Incorporated by reference to Exhibit 10.2 to the Registrant's Form 8-K filed on November 2, 2004.)
10.20 (1) Amendment of Agreement Re: Change in Control, dated December 31, 2007, between Quidel Corporation and Thomas J. Foley. (Incorporated by reference to Exhibit 10.8 to the Registrant's Form 8-K filed on January 3, 2008.)
10.21 (1) Employment Offer Letter, entered into on June 13, 2005, between Registrant and Robert J. Bujarski, J.D. (Incorporated by reference to Exhibit 10.1 to the Registrant's Form 8-K filed on June 17, 2005.)
10.22 (1) Amendment of Employment Offer Letter dated December 31, 2007, between Quidel Corporation and Robert J. Bujarski. (Incorporated by reference to Exhibit 10.2 to the Registrant's Form 8-K filed on January 3, 2008.)
10.23 (1) Agreement Re: Change in Control, entered into on February 14, 2007, between Registrant and Robert J. Bujarski, J.D. (Incorporated by reference to Exhibit 10.3 to the Registrant's Form 8-K filed on February 20, 2007.)
10.24 (1) Amendment of Agreement Re: Change in Control, dated December 31, 2007, between Quidel Corporation and Robert J. Bujarski. (Incorporated by reference to Exhibit 10.7 to the Registrant's Form 8-K filed on January 3, 2008.)
10.25 (1) Employment Offer Letter, entered into on December 18, 2006, between Quidel Corporation and John M. Radak. (Incorporated by reference to Exhibit 10.1 to the Registrant's Form 8-K filed on January 3, 2007.)
10.26 (1) Amendment of Employment Offer Letter dated December 31, 2007, between Quidel Corporation and John M. Radak. (Incorporated by reference to Exhibit 10.3 to the Registrant's Form 8-K filed on January 3, 2008.)
10.27 (1) Agreement Re: Change in Control, entered into on December 18, 2006, between Quidel Corporation and John M. Radak. (Incorporated by reference to Exhibit 10.2 to the Registrant's Form 8-K filed on January 3, 2007.)
10.28 (1) Amendment of Agreement Re: Change in Control, dated December 31, 2007, between Quidel Corporation and John M. Radak. (Incorporated by reference to Exhibit 10.10 to the Registrant's Form 8-K filed on January 3, 2008.)
10.29 (1) Employment Offer Letter dated June 19, 2007, between Registrant and Richard C. Tarbox III. (Incorporated by reference to Exhibit 10.1 to the Registrant's Form 8-K filed on June 26, 2007.)
10.30 (1) Amendment of Employment Offer Letter dated December 31, 2007, between Quidel Corporation and Richard C. Tarbox III. (Incorporated by reference to Exhibit 10.4 to the Registrant's Form 8-K filed on January 3, 2008.)
10.31 (1) Agreement Re: Change in Control, entered into on June 25, 2007, between Registrant and Richard C. Tarbox III. (Incorporated by reference to Exhibit 10.2 to the Registrant's Form 8-K filed on June 26, 2007.)
10.32 (1) Amendment of Agreement Re: Change in Control, dated December 31, 2007, between Quidel Corporation and Richard C. Tarbox III. (Incorporated by reference to Exhibit 10.11 to the Registrant's Form 8-K filed on January 3, 2008.)

10.33 (1) Agreement Re: Change in Control, entered into on June 25, 2007, between Registrant and Scot M. McLeod. (Incorporated by reference to Exhibit 10.3 to the Registrant's Form 8-K filed on June 26, 2007.)
10.34 (1) Amendment of Agreement Re: Change in Control, dated December 31, 2007, between Quidel Corporation and Scot M. McLeod. (Incorporated by reference to Exhibit 10.9 to the Registrant's Form 8-K filed on January 3, 2008.)
10.35 (1) Change in Control Agreement dated July 19, 2004 between the Registrant and Michael J. Beck. (Incorporated by reference to Exhibit 10.35 to the Registrant's Form 10-Q for the quarter ended June 30, 2004.)
10.36 (1) Amendment of Agreement Re: Change in Control, dated December 31, 2007, between Quidel Corporation and Michael J. Beck. (Incorporated by reference to Exhibit 10.6 to the Registrant's Form 8-K filed on January 3, 2008.)
10.37 (1) Consulting Agreement dated December 29, 2006, between Registrant and Paul E. Landers. (Incorporated by reference to the Registrant's Form 8-K filed on January 5, 2007.)
10.38 (1) Separation and Release Agreement, between Registrant and Mark E. Paiz, dated June 1, 2007. (Incorporated by reference to Exhibit 10.1 to the Registrant's Form 8-K filed on June 4, 2007.)
10.39 (1) Annual Base Salary for the Company's Executive Officers effective as of March 5, 2007. (Incorporated by reference to Exhibit 10.1 to the Registrant's Form 8-K filed on February 20, 2007.)
10.40 (1) Registrant's 2007 Short Term Cash Incentive Plan. (Incorporated by reference to Exhibit 10.3 to the Registrant's Form 8-K filed on April 4, 2007.)
10.41 (1) Executive officers' 2007 Equity Award Plan. (Incorporated by reference to Exhibit 10.1 to the Registrant's Form 8-K filed on April 4, 2007.)
10.42 (1) Form of 2007 Executive Officer Restricted Stock Award Agreement. (Incorporated by reference to Exhibit 10.2 to the Registrant's Form 8-K filed on April 4, 2007.)
10.43   Credit Agreement, by and among the Registrant, as Borrower, each lender from time to time party thereto (collectively, "Lenders" and individually, a "Lender") and Bank of America, N.A., as Agent and L/C Issuer, dated as of January 31, 2005 and as amended through September 27, 2007. (Incorporated by reference to Exhibit 10.1 to the Registrant's Form 8-K filed on October 1, 2007.)
10.44   Fourth Amendment to Credit Agreement, dated as of September 27, 2007, by and among the Registrant, as Borrower, certain subsidiaries of the Registrant, each lender from time to time a party thereto and Bank of America, N.A., as Agent and L/C Issuer. (Incorporated by reference to Exhibit 10.2 to the Registrant's Form 8-K filed on October 1, 2007.)
21.1*   Subsidiaries of the Registrant.
23.1*   Consent of Independent Registered Public Accounting Firm.
31.1*   Certification by Chief Executive Officer of Registrant pursuant to Rules 13a-14 and 15d-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2*   Certification by Principal Financial and Accounting Officer of Registrant pursuant to Rules 13a-14 and 15d-14, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32.1*   Certifications by Chief Executive Officer and Principal Financial and Accounting Officer of Registrant pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
*
Filed herewith

(1)
Indicates a management plan or compensatory plan or arrangement.



QuickLinks

Part I
Part II
COMMON STOCK PRICE RANGE
STOCKHOLDER RETURN PERFORMANCE GRAPH
Comparison Of Five Year Cumulative Total Return* Among Quidel Corporation, The NASDAQ Composite Index And The NASDAQ Pharmaceutical Index
Part III
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM ON INTERNAL CONTROL OVER FINANCIAL REPORTING
Part IV
SIGNATURES
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM ON FINANCIAL STATEMENTS
QUIDEL CORPORATION CONSOLIDATED BALANCE SHEETS (in thousands, except par value)
QUIDEL CORPORATION CONSOLIDATED STATEMENTS OF OPERATIONS
QUIDEL CORPORATION CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
QUIDEL CORPORATION CONSOLIDATED STATEMENTS OF CASH FLOWS
QUIDEL CORPORATION CONSOLIDATED VALUATION AND QUALIFYING ACCOUNTS (in thousands)
EXHIBIT INDEX