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Table 3 Comparison of the in vitro activities of selected antimicrobial agents tested against Pseudomonas aeruginosa (404 strains)
| Antimicrobial agent | MIC50 | MIC90 | Range | % susceptible / resistanta |
|---|---|---|---|---|
| Ceftazidime | 2 | >16 | ≤1 – >16 | 71.7 / 24.0 |
| Cefepime | 4 | 16 | 0.5 – >16 | 77.9 / 9.9 |
| Piperacillin/tazobactamb | 8 | >64 | ≤0.5 – >64 | 68.8 / 15.5 |
| Imipenem | 2 | >8 | ≤0.12 – >8 | 74.9 / 17.8 |
| Meropenem | 0.5 | >8 | ≤0.12 – >8 | 76.4 / 12.8 |
| Ciprofloxacin | 0.25 | >4 | ≤0.03 – >4 | 75.2 / 20.0 |
| Levofloxacin | ≤0.5 | >4 | ≤0.5 – >4 | 74.2 / 24.0 |
| Gentamicin | ≤2 | >8 | ≤2 – >8 | 64.1 / 31.9 |
| Amikacin | 4 | >32 | ≤4 – >32 | 70.3 / 23.7 |
| PolymyxinB | 1 | 1 | ≤0.5 – 2 | 100.0 / 0.0 |
| Colistin | 1 | 2 | ≤0.5 – 2 | 100.0 / 0.0 |
