| 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 | − | + |