CHATSWORTH, Calif., Feb. 24, 2011 (GLOBE NEWSWIRE) -- IRIS International, Inc. (Nasdaq:IRIS), a leading manufacturer of automated in-vitro diagnostics systems and consumables for use in hospitals and commercial laboratories worldwide, and a provider of high value personalized diagnostics testing services through its CLIA certified molecular diagnostics laboratory, today announced that its Sample Processing division has signed a five-year extension to its exclusive supply agreement for its flagship veterinary centrifuge with IDEXX Laboratories, Inc. (Nasdaq:IDXX).