Characteristics

B1

B2

B3

B4

B5

B6

Colony color

White growth

White waxy growth                                                       

White shiny growth

Thin even growth

Grayish growth

Yellow growth

Gram staining

Rod –ve

Rod +ve

Cocci +ve

Cocci +ve

Rod –ve

Cocci +ve

Amylase

-ve

-ve

A

A

-ve

-ve

Indole

-ve

-ve

-ve

-ve

+ve

-ve

Catalase

+ve

+ve

+ve

-ve

+ve

+ve

Citrate

+ve

-ve

-ve

-ve

-

-ve

Methyl red

-ve

-ve

+ve

+ve

+ve

-ve