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.