Table 1.
Antimicrobial Susceptibilities of A. baumannii Determined by the Broth Microdilution Method
| Antimicrobial Agents | MIC (mg/L) | Susceptible Rate (%) | Intermediate Rate (%) | Resistant Rate (%) | ||
|---|---|---|---|---|---|---|
| Range | MIC50 | MIC90 | ||||
| Ceftazidime | 1–>32 | >32 | >32 | 11.7 | 0.7 | 87.7 |
| Cefepime | 0.5–>128 | 128 | >128 | 12.0 | 1.7 | 86.3 |
| Aztreonam | 4–>128 | 64 | 128 | 3.3 | 7.7 | 89.0 |
| Piperacillin-tazobactama | ≤2–>256 | >256 | >256 | 10.7 | 0.7 | 85.3 |
| Meropenem | 0.12–>64 | 64 | >64 | 12.0 | 0.7 | 87.3 |
| Ciprofloxacin | ≤0.06–>8 | >8 | >8 | 12.0 | 0.0 | 88.0 |
| Levofloxacin | ≤0.12–>16 | 8 | >64 | 12.3 | 3.3 | 84.3 |
| Amikacin | ≤1–>128 | >128 | >128 | 17.7 | 0.7 | 81.7 |
| Trimethoprim-sulfamethoxazoleb | ≤0.25–32 | >32 | >32 | 28.3 | / | 71.7 |
| Tigecycline | ≤0.06–16 | 1 | 2 | 98.7 | 1.0 | 0.3 |
| Polymyxin B | 0.25–4 | 1 | 2 | 99.3 | / | 0.7 |
Notes: aFor piperacillin-tazobactam, only concentration of piperacillin is listed. bFor trimethoprim-sulfamethoxazole, only concentration of trimethoprim is listed.