A chromogenic medium for the identification and differentiation of pathogenicyeasts, CHROMagar Candida (CAC), was first reported in 1994 (2). As well as antibacterialagents, the medium incorporates two chromogenic substrates for the detection of? -hexosaminidase activity and phosphatase activity (18). The medium affords specificidentification of Candida albicans/Candida dubliniensis, which form green colonies dueto production of ? -hexosaminidase, and Candida tropicalis, which forms blue coloniesdue to production of both enzymes. Other species of yeast form pink colonies due tophosphatase activity alone or produce neither of these enzymes and grow as whitecolonies. A range of commercially available chromogenic media has since been eval-uated, including Albicans ID (19), CandiSelect (19), Candida ID (20), Candida diagnostic