IRIS International to Release First Quarter Financial Results and Host Conference Call Thursday, April 22, 2004 CHATSWORTH, Calif., April 14 /PRNewswire/ -- IRIS INTERNATIONAL, INC. will hold a conference call with members of the investment community on Thursday, April 22, at 11:00 a.m. Eastern time. Cesar Garcia, President and Chief Executive Officer, and Martin G. Paravato, Chief Financial Officer, will be reviewing the Company's financial results for the first quarter ended March 31, 2004, which will be announced that morning. To participate, dial 1-800-334-0872 approximately 10 minutes before the conference call is scheduled to begin. Hold for the operator and reference the IRIS International conference call. International callers should dial 913-981-5567. The conference call may also be accessed by means of a live audio Web cast on the Company's Web site at http://www.proiris.com/, or at http://www.vcall.com/, the Web cast service provider. The conference audio cast will also be available for replay on both Web sites for 30 days from the date of the broadcast. For anyone who is unable to participate in the conference, access to a recording will be available for 48 hours following the call. Dial 1-800-428-6051 to access playback. For international callers, dial 973-709-2089. The pass code I.D. is 351107. THE COMPANY IRIS International, Inc. (http://www.proiris.com/) is a leader in automated urinalysis technology with systems in major medical institutions throughout the world. The Company's newest generation iQ(R)200 fully Automated Urine Microscopy Analyzer utilizing image flow cytometry, patented Automated Intelligent Microscopy (AIM) technology and neural network-based particle recognition capabilities achieves a significant reduction in the cost and time-consuming steps for manual microscopic analysis. The Company's StatSpin(R) subsidiary, based in Norwood, Mass., manufactures innovative centrifuges and blood analysis products. Advanced Digital Imaging Research, LLC (ADIR), based near Houston, Texas, is the Company's imaging research and development subsidiary. CONTACT: Cesar Garcia, President and Chief Executive Officer of IRIS International, Inc., +1-818-709-1244; or Ron Stabiner of The Wall Street Group, Inc., +1-212-888-4848. DATASOURCE: IRIS International, Inc. CONTACT: Cesar Garcia, President and Chief Executive Officer of IRIS International, Inc., +1-818-709-1244; or Ron Stabiner of The Wall Street Group, Inc., +1-212-888-4848 Web site: http://www.proiris.com/

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