LITMUS LACTOSE BILE SALT AGAR (LLBSA)

Numerous plating media are in use today for the differentiation of lactose-fermenters and lactose non-fermenters. Some of these are selective, whereas others are differential. Some lactose fermenting, gram-negative enteric bacteria can tolerate the inhibitory substances present in the media. These bacteria can be recognized readily by their appearance on selective plates. Litmus Lactose Bile Salt Agar is a modification of Litmus Lactose Agar formulated by Wurtz and is used for the isolation of enteric bacteria. It can be successfully used in place of MacConkey Agar.

for selective isolation of enteric bacteria on the basis of lactose fermentation