Table 4 MICs of 14 antimicrobial agents for 73 TCD isolates by agar dilution method
Antimicrobial agent | Breakpoint of resistant (ug/ml) | MIC (ug/ml) | No. (%) of isolates | ||||
|---|---|---|---|---|---|---|---|
MIC50 (ug/ml) | MIC90 (ug/ml) | Range (ug/ml) | Sensitive | Intermediate | Resistant | ||
Metronidazole | ≥ 32 | 0.25 | 0.25 | ≤0.03–1 | 73 (100) | 0 (0) | 0 (0) |
Piperacillin/tazobactam | ≥128/4 | 4 | 8 | ≤0.03–16 | 73 (100) | 0 (0) | 0 (0) |
Meropenem | ≥16 | 1 | 2 | ≤0.03–8 | 72 (98.6) | 1 (1.4) | 0 (0) |
Tetracycline | ≥16 | 0.25 | 16 | ≤0.03–32 | 54 (74.0) | 9 (12.3) | 10 (13.7) |
Clindamycin | ≥8 | 8 | > 128 | ≤0.03- > 128 | 27 (37.0) | 7 (9.6) | 39 (53.4) |
Erythromycin | ≥8 | 128 | > 128 | ≤0.03- > 128 | 28 (38.4) | – | 45 (61.6) |
Chloramphenicol | ≥ 32 | 4 | 8 | ≤0.03–16 | 72 (98.6) | 1 (1.4) | 0 (0) |
Vancomycin | ≥ 32 | 0.5 | 1 | ≤0.03–16 | 73 (100) | – | 0 (0) |
Rifampicin | ≥ 32 | ≤0.03 | ≤0.03 | ≤0.03–1 | 73 (100) | – | 0 (0) |
Levofloxacin | ≥8 | 4 | 64 | ≤0.03- > 128 | 61 (83.6) | – | 12 (16.4) |
Ciprofloxacin | ≥8 | 8 | 32 | ≤0.03- > 128 | 21 (28.8) | – | 52 (71.2) |
Moxifloxacin | ≥8 | 2 | 8 | ≤0.03–32 | 64 (87.7) | 0 (0) | 9 (12.3) |
Fusidic acid | > 0.5 | 0.5 | 8 | ≤0.03–16 | 40 (54.8) | – | 33 (45.2) |
Linezolid | > 4 | 2 | 4 | ≤0.03–4 | 73 (100) | – | 0 (0) |