Table 4 Comparison of the in vitro activities of selected antimicrobial agents tested against Acinetobacte spp. a (362 strains)
Antimicrobial agent | MIC50 | MIC90 | Range | % susceptible / resistantb |
|---|---|---|---|---|
Ceftazidime | >16 | >32 | ≤1 – >16 | 17.1 / 74.3 |
Cefepime | 16 | >16 | ≤0.12 – >16 | 28.7 / 49.4 |
Piperacillin / tazobactam | >64 | >64 | ≤0.5 – >64 | 16.3 / 77.9 |
Imipenem | 4 | >8 | ≤0.12 – >8 | 52.3 / 36.4 |
Meropenem | 4 | >8 | ≤0.12 – >8 | 52.3 / 37.4 |
Ciprofloxacin | >4 | >4 | ≤0.03 – >4 | 18.2 / 81.2 |
Levofloxacin | >4 | >4 | ≤0.5 – >4 | 18.7 / 78.1 |
Gentamicin | >8 | >8 | ≤2 – >8 | 34.2 / 63.5 |
Amikacin | >32 | >32 | ≤4 – >32 | 22.1 / 64.9 |
PolymyxinB | ≤0.5 | ≤0.5 | ≤0.5 – >4 | 98.6 / 1.4 |
Colistin | ≤0.5 | 1 | ≤0.5 – >4 | 98.5 / 1.5 |