BM0610 – Tryptone Water

BM0610 – Tryptone Water

Tryptone Water is an alternative medium to Peptone Water and more reliable for the testing of Indole production. The medium has a high content of Tryptophan that many organisms, particularly coliforms, break down to form Indole. After incubation add a few drops of Indole reagent to determine the Indole reaction  (Red colour is Positive).

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Organisms Ref. No Result
Escherichia coli NCTC 12241 Growth & Indole Positive
Enterobacter aerogenes NCTC 10006 Growth & Indole Negative