Best selective media for Salmonella ?
Correct Answer: Wilson and Blair's brilliant-green bismuth sulphite agar medium
Description: Wilson and Blair's brilliant-green bismuth sulfite agar (WBBS) -Best selective and indicator medium used for the isolation of Salmonella species. Bismuth sulfite, brilliant green - inhibitors- hinder the growth of most bacteria while allowing salmonella to grow. Ferrous sulphate- Reacts with H2S - formation of ferrous sulfide-brown-black coloration and also diffuses into the surrounding medium, giving a brown -black halo. Option 1: Thiosulphate citrate bile salt agar(TCBS) is used for Vbrio. Option 3: Sorbitol MaCconkey agar -For EHEC (Enterohaemorrhagic Escherichia coli).
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Microbiology
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