Test Isolate I Isolate II Isolate-III Isolate-IV Shape circular Blunt end rods circular Circular Gram character Gram positive cocci Gram negative short rods Gram positive cocci Gram positive cocci Amylase   – –  +   – Glucose utilization + +  +  + Gelatinase – – + + β-Galactosidase + +  – + Catalase + +  +  + Oxidase – – – – Indole _ _ _ _

(‘+’Positive test, ‘-’ negative test)

Table 1: Biochemical characterization of isolates.