Indole is a putrefactive compound produced by the degradation of
the amino acid, tryptophan. In the present study, the Vibrio sp were
found positive for indole, which shows the ability of organisms to
degrade the amino acid to indole. The Vibrio strains show varying test. Present study reveals that, both the isolate showed positive
reaction by giving red color, when the indicator was added. Both
the isolate was positive for VP test and the isolate utilized citrate
i.e., positive for citrate utilization.