This medium is recommended for cultivation and differentiation of enteric bacteria restricting swarming of Proteus species from specimens such as urine which may contain large number of Proteus species as well as potentially pathogenic Gram positive organisms. Based on lactose fermentation with neutral red as indicator. Detection of Enterobacteriaceae and Coliforms . Lactose fermenting strains grow as red or pink and may be surrounded by a zone of acid precipitated bile. Lactose non-fermenting strains are colourless and transparent. The selective action of this medium is attributed to sodium taurocholate which is inhibitory to most species of gram-positive bacteria.