Peptone Water is recommended by BIS (1) for detection of Indole production by Escherichia coli . A slightly different formulation of Peptone water/ Peptone water with phenol red is recommended (2,3,4) for studying the ability of organisms to ferment a specific carbohydrate which aids in…

Peptone Water is particularly suitable as a substrate in the study of indole production. Peptic digest of animal tissue used in Peptone Water is rich in tryptophan content. Peptone Water is also utilized as a base for carbohydrate fermentation studies with the addition of sugar and indicators such…