Which of the following bacteria shows this test positive?: (A) E coli, (B) Klebsiella, (C) Proteus mirabilis, (D) Proteus Edwardsiella
Answer is A. Klebsiella,Proteus mirabilis show indole test negative showing yellow ring Red ring-positive- e.g.: E coli, Proteus other than mirabilis, Edwardsville Ref: Textbook of Microbiology Baveja 5th ed Pg 53