Hardy Diagnostics, Santa Maria, Calif, has released HardyChrom Vibrio, a highly selective culture medium for use in primary screening, isolation, and differentiation of Vibrio pathogens. The shellfish pathogen V. parahaemolyticus is differentiated from other Vibrios such as V. alginolyticus by its teal coloration, while the deadly pathogens V. cholerae and V. vulnificus are differentiated from other Vibrios by their magenta coloration and from each other by the fluorescence of V. vulnificus under ultraviolet light. Providing a fluorogenic reaction for thorough differentiation, HardyChrom Vibrio is the only chromogenic medium to differentiate these Vibrios on the same plate. Independent studies showed superior performance compared to the traditional thiosulfate-citrate-bile salts-sucrose agar method and reduced cost compared to molecular screening methods employing polymerase chain reaction. HardyChrom Vibrio is available in the Criterion dehydrated culture medium format, as well as in prepared plated media. The medium’s formula has a patent pending. For more information, visit Hardy Diagnostics.