Table 2.
Antimicrobial Spectrum Evaluation Percentage of Carbapenem-Resistant Klebsiella pneumoniae Isolates Resistance to Various Antibiotics
| Antimicrobial Agents | CRKP Isolates (n=56) | CSKP Isolates (n=47) | P-value | ||||
|---|---|---|---|---|---|---|---|
| MIC50 | MIC90 | R% | MIC50 | MIC90 | R% | ||
| CTX | 256 | >256 | 100 | 48 | >128 | 74.5 | <0.01 |
| CAZ | >256 | >256 | 100 | 8 | 128 | 55.3 | <0.01 |
| FEP | 128 | >256 | 100 | 8 | 16 | 61.7 | <0.01 |
| CT | 0.25 | 0.5 | 1.8 | 0.5 | 0.5 | 0 | 0.362 |
| TGC | 1 | 4 | 12.5 | 1 | 2 | 8.5 | 0.519 |
| IMP | 16 | >32 | 89.3 | ≤0.25 | 0.375 | 2.1 | <0.01 |
| ETP | >16 | >16 | 100 | ≤0.25 | ≤0.25 | 2.1 | <0.01 |
| MEM | 16 | >16 | 94.6 | ≤0.25 | 0.25 | 0 | <0.01 |
| CIP | 2 | 128 | 57.1 | 1 | 64 | 42.6 | 0.134 |
| FOS | 512 | >512 | 92.9 | >512 | >512 | 97.9 | 0.24 |
| SXT | 2/38 | 16/304 | 48.2 | >16 | >16 | 59.6 | 0.254 |
| PTZ | 512 | >512 | 94.6 | 4 | 12 | 8.5 | <0.01 |
| AMK | 4 | >256 | 48.2 | 2 | 4 | 6.4 | <0.01 |
| GEN | 128 | >256 | 60.7 | ≤1 | 128 | 38.3 | 0.023 |
| ATM | >128 | >128 | 96.4 | 12 | 128 | 55.3 | <0.01 |
Note: P values less than 0.05 are bolded.
Abbreviations: CTX, cefotaxime; CAZ, ceftazidime; FEP, cefepime; CT, colistin; TGC, tigecycline; IMP, imipenem; ETP, ertapenem; MEM, meropenem; CIP, ciprofloxacin; FOS, fosfomycin; SXT, trimethoprim-sulfamethoxazole; PTZ, piperacillin-tazobactam; AMK, amikacin; GEN, gentamicin; ATM, aztreonam.