Litmus Lactose Bile Salt Agar (LLBSA)
Details
Litmus Lactose Bile Salt Agar (LLBSA) is recommended for selective isolation of enteric bacteria on the basis of lactose fermentation. Sodium taurocholate inhibits the growth of gram-positive microorganisms. Lactose is the fermentable sugar utilized by coliform enteric bacteria leading to production of acid. Litmus acts as pH indicator. Organisms grows luxuriantlly on the media and shows different colony color like Escherichia coli shows red color, Salmonella Typhi shows deep blue to violet, Proteus mirabilis shows blue to violet (with (no swarming).
