Indole test (tryptophan hydrolysis test): Principle, Procedure, Result

Indole test also called as tryptophan hydrolysis test, due to decomposition of tryptophan (Amino Acid). Principle of indole test when some bacteria react with Tryptophan (amino acid), hydrolysis it and change it o Indole compound. This Indole compound is visualized by the Ehrlich reagent. This compound changes the agar color into PINK. Note: If we … Read more