| TEST(S) | Micro-Organisms | |||
| Serratia marcescens | Erwinia carotovora | Klebsiella oxytoca | Pseudomonas aeruginosa | |
| Gram Staiming Reaction | − | − | − | − |
| Catalase | + | + | − | + |
| Oxidase | − | − | − | + |
| Citerate Utilisation | + | − | + | + |
| Gas | − | − | − | − |
| H2S (Hydrogen Sulphide) | − | − | − | − |
| Motility | + | + | − | + |
| Pigment | Red | − | − | Blue |
| PH (Nutrient Broth Medium) | 7.49 | 7.36 | 7.46 | 7.30 |
| Acid | + | − | − | + |