Test(s)

Microorganisms

Erwinia carotovora

Pseudomonas aeruginosa

Gram staining reaction

Catalase

+

+

Oxidase

+

Citrate utilisation

+

Gas

H2S (hydrogen sulphide)

Motility

+

+

Pigment

Blue

pH (in nutrient broth medium)

7.47

7.43

Acid

+