Exhibit 99.1 [IDEXX LABORATORIES LOGO] Contact: Merilee Raines, Vice President, Finance, (207) 856-0446 FOR IMMEDIATE RELEASEIDEXX Laboratories Announces First Quarter Results WESTBROOK, Maine, April 21, 2003 — IDEXX Laboratories, Inc. (NASDAQ: IDXX) today reported that net income increased 68% to $12.1 million for the quarter ended March 31, 2003, from $7.2 million for the same period in the prior year. Earnings per diluted share for the quarter were $0.34, a 62% increase over earnings per diluted share of $0.21 for the quarter ended March 31, 2002. During the first quarter of 2002, the Company incurred an after tax charge of $1.9 million, or $0.05 per diluted share, related to the retirement of its former CEO. Excluding the effect of the 2002 charge, net income and earnings per share would have increased 33% and 31%, respectively, in 2003. Revenue for the first quarter of 2003 increased 13% to $109.2 million from $96.6 million for the first quarter of 2002. Companion Animal Group (CAG) revenue for the first quarter of 2003 increased 15% to $88.2 million from $76.4 million for the first quarter of 2002.This increase resulted primarily from increased sales of instruments and consumables, including the sale of 183 units of the Company’s LaserCyte hematology system, which was introduced in the fourth quarter of 2002, and increased sales of rapid assays and laboratory services. Approximately 3% of CAG revenue growth was due to the favorable impact of foreign currency exchange. Food and Environmental Group revenue for the first quarter of 2003 increased 5% to $21.1 million from $20.1 million for the first quarter of 2002. Increased sales of water testing and production animal diagnostic products were offset partially by a decline in sales of dairy testing products. Excluding the favorable effect of foreign currency exchange, FEG sales would have been approximately flat relative to 2002 sales. “We are very pleased with the Company’s strong profit performance this quarter, which resulted from accelerated sales growth and improving margins,” said Jonathan W. Ayers, Chairman and CEO. “We achieved solid progress with the LaserCyte hematology system launch, as we continued a disciplined ramp-up in volumes. Our first quarter results also reflect good performance from our international business, which had strong volume growth that was further enhanced by currency translation.”
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Outlook for 2003 The Company offers the following guidance for the full year of 2003: |