Immediate differentiation of Salmonella-resembling colonies on brilliant green agar

Abstract

A rapid biochemical system (OBIS) based on immediate enzymatic differentiation of Citrobacter, Proteus, Providencia, Hafnia and Morganella spp. from Salmonella on brilliant green agar was evaluated, A total of 96 field isolates from various Salmonella serotypes, 18 Citrobacter freundii and 25 isolates of other Enterobacteriaceae were tested. All Salmonella isolates were identified correctly by the kit, and none of the Enterobacteriaceae isolates were identified as Salmonella. The results indicate complete specificity for Salmonella colonies on brilliant green agar.