HardyCHROM Salmonella is a chromagenic medium recommended for the selective isolation and differentiation ofSalmonellaspp from other members of theEnterobacteriaceaefamily based on colony colour.
Selective agents inhibit the growth of gram-positive organisms. Artificial substrates (chromogens) are broken down by specific microbial enzymes which release insoluble coloured compounds.
Salmonellaspecies will produce deep pink to magenta colour coloured colonies
Other bacteria may utilize the chromagenic substrates and produce blue colonies
If none of the substrates are utilized, natural or white colonies will be present