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Description

Lactose Broth is an inhibitor-free granulated medium for the use in the presumptive testing for coliforms, especially E. coli, and the enrichment of Salmonella. The granules ensure rapid and uniform dissolution in water, it also prevents clumping of the medium and inhalation of the airborne powder. Lactose utilization is indicated by gas production. The gas liberated is collected in Durham's tubes. Peptone present in the medium supply nitrogenous and carbonaceous compounds, long-chain amino acids, and other essential nutrients to the organisms. Lactose is a fermentable carbohydrate for the coliforms.