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| tested organism | Gram reaction | zone of inhibition (mm) |
|---|---|---|
| Bacillus cereus | +ve | 30 |
| Staphylococcus aureus | +ve | 22 |
| Pseudomonas aeruginosa | –ve | 24 |
| Vibrio cholera | –ve | 25 |
| Escherichia coli | –ve | 14 |
