| Antimicrobial agents | Interpretation | Zone of inhibition (mm) |
| Ciprofloxacin | Sensitive | ≥21 |
| Levofloxacin | Sensitive | ≥17 |
| Meropenem | Sensitive | ≥23 |
| Gentamicin | Sensitive | ≥15 |
| Amikacin | Sensitive | ≥17 |
| Pipercillin + tazobactam | Intermediate | 18 - 20 |
| Ceftriaxone | Resistant | ≤19 |
| Ceftazidime | Resistant | ≤17 |