MANNITOL AGAR W/ PRILION

Mannitol Agar w/ Prilion is a selective medium developed by Pietzsch for the isolation and differentiation of Salmonella from Proteus species. This medium helps to distinguish between lactose-negative, mannitol-positive Salmonella colonies from lactose-negative, mannitol-negative Proteus colonies by their different colouration. But as both Salmonella and coliform bacteria ferment mannitol, they cannot be differentiated from one another on this medium. The prepared culture medium is green; in the acidic pH range it becomes blue-green to blue. At alkaline pH; however, the yellow colour of the metachrome yellow becomes increasingly apparent.

selective agar medium for isolation and differentiation of Salmonella from Proteus species