Table 2.
Minimal inhibitory concentrations and antibiotic susceptibility interpretations of PA (n = 92)
| Antibiotic | MIC range (mg/L) | MIC50 (mg/L) | MIC90 (mg/L) | S (%) | I (%) | R (%) |
|---|---|---|---|---|---|---|
| Beta-lactams | ||||||
| Imipenem | 0.5–32 | 24 | 32 | 19.6 | 20.7 | 59.8 |
| Piperacillin/tazobactam | 0.5–256 | 16 | 256 | 50.0 | 0 | 50.0 |
| Meropenem | 0.125–32 | 8 | 32 | 28.3 | 25.0 | 46.7 |
| Cefepime | 0.5–256 | 6 | 32 | 70.7 | 0 | 29.3 |
| Ceftazidime | 0.75–256 | 2 | 64 | 73.9 | 0 | 26.1 |
| Ciprofloxacin | 0.064–32 | 0.5 | 32 | 53.3 | 0 | 46.7 |
| Aminoglycosides | ||||||
| Gentamicin | 0.125–256 | 2 | 48 | 80.4 | 0 | 19.6 |
| Amikacin | 1–256 | 6 | 16 | 75.0 | 17.4 | 7.6 |
| Tobramycin | 0.125–256 | 1 | 4 | 90.2 | 0 | 9.8 |
Abbreviations: MIC50 minimal inhibitory concentration inhibiting 50% of isolates, MIC90 minimal inhibitory concentration inhibiting 90% of isolates, S susceptible, I intermediately susceptible, R resistant