S. No.

Biochemical tests

S. aureus

S. typhi

1

Oxidase

2

Catalase

+

+

3

Coagulase

+

×

4

DNase

+

5

Indole

6

Urease

+

7

Citrate

+

+

8

H2S

+

9

Suc. Ferm.

+

+

10

Fruc. Ferm.

+

+

11

Gluc. Ferm.

+

+

12

Mannitol

+

+

13

Motility test

Non Motile

Motile

14

Morphology Gram staining

Gram positive

Gram negative Rods