Table 4 MIC distributions for various antibiotics against 59 carbapenem-resistant P. aeruginosa isolates
Antibiotics | No (cumulative%) of isolates at MIC (μg/ml) | MIC50 | MIC90 | Range | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | 2 | 4 | 8 | 16 | 32 | 64 | 128 | 256 | 512 | ≥1024 | ||||
Imipenem | − | − | 3(5.08) | 1(1.6) | 5(8.4) | 2(3.3) | 8(13.5) | 1(1.6) | 2(3.3) | 12(20.3) | 25(42.3) | 512 | 1024 | 8–1024 |
Meropenem | 1(1.6) | 1(1.6) | 3(5.08) | 1(1.6) | 1(1.6) | 5(8.4) | 9(15.2) | 5(8.4) | 18(30.5) | 15(25.4) | − | 256 | 512 | 8–512 |
Ceftazidime | − | 1(1.6) | 4(6.7) | 5(8.4) | 1(1.6) | 1(1.6) | 4(6.7) | 1(1.6) | 1(1.6) | 1(1.6) | 40(67.7) | ≥1024 | ≥1024 | 2 to >1024 |
Levofloxacin | − | − | − | − | 2(3.3) | 6(10.1) | 7(11.8) | 20(33.8) | 22(37.2) | 2(3.3) | − | 128 | 256 | 16–512 |
Gentamicin | − | − | 3(5.08) | 4(6.7) | 3(5.08) | 3(5.08) | − | − | − | − | 46(77.9) | >1024 | >1024 | 8 to >1024 |