Growth Temperature of Five Bacterial Pathogens for Eel

Abstract

Range and optimum of growth temperature for Aeromonas hydrophila, Edwardsiella tarda, Pseudomonas anguilliseptica, Vibrio anguillarum, and V. vulnificus were determined by testing 10 or 15 strains of each species with a temperature-gradient shaking incubator. Aeromonas hydrophila, E.. tarda and V. vulnificus biogroup 1 grew optimally at temperatures between 30 and 35°C. Vibrio anguillarum and V. vulnificus biogroup 2 grew optimally at 25-30°C and P. anguilliseptica at 22-27°C. The differences in growth temperature among intra-species subgroups separated by serotype, virulence or biotype were also studied.