IDEXX Laboratories to Webcast Annual Meeting May 19, 2004

IDEXX Laboratories Chairman and CEO Jonathan W. Ayers will chair the meeting. Investors may listen to the Annual Meeting and view a simultaneous presentation live via a link on the Investor Relations section of the Company's Web site, idexx.com. Interested individuals are encouraged to access the link to the Webcast Meeting 15 minutes prior to its commencement to ensure the availability of the necessary audio software. An archived edition of the Meeting will be available after 1:00 p.m. (eastern) on that day via the same link.

IDEXX Laboratories, Inc., is a worldwide leader in the development and commercialization of innovative, technology-based products and services for veterinary, food and water applications. The Company's largest business is focused on companion animal health, combining biotechnology, medical device technology and information technology to aid veterinarians in providing better medicine while building successful practices. IDEXX Laboratories' food and water businesses are focused on employing innovative technologies to monitor production animal health and the safety and quality of drinking water and milk. Headquartered in Westbrook, Maine, IDEXX Laboratories employs more than 2,500 people and offers products to customers in over 100 countries.

This press release contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. These statements are based on management's current expectations of future events, which are subject to risks and uncertainties. If underlying assumptions prove inaccurate, actual results could vary materially from management's expectations. Risks and uncertainties include timing and success of new product introductions, competition and technological change, government regulation and obtaining government approvals, product demand and market acceptance of products, availability of products and raw materials, and litigation. A further description of these risks and uncertainties and other factors can be found in the Company's Annual Report on Form 10-K for the year ended December 31, 2003 (4,003 KB) and the Quarterly Report on Form 10-Q for the quarter ended June 30, 2004 (2,054 KB), in the section captioned "Management's Discussion and Analysis of Financial Condition and Results of Operations." The Company assumes no obligation to update any forward-looking statements as a result of new information or future events or developments.