Table 1.
Antibiotic susceptibility profiles of the bla CTX-M ESBL-positive E. coli and K. pneumoniae.
| Antibiotics | MIC (μg/ml) for the bla CTX-M-positive isolates: | |||
|---|---|---|---|---|
| E. coli | K. pneumoniae | |||
| (n = 18) | (n = 10) | |||
| MIC50 | MIC90 | MIC50 | MIC90 | |
| Amikacin | 2 | 16 | 0.5 | 4 |
| Ampicillin | >256 | >256 | >256 | >256 |
| Amoxicillin-clavulanate | 6 | 16 | 8 | 16 |
| Aztreonam | >256 | >256 | >256 | >256 |
| Cefepime | >256 | >256 | >256 | >256 |
| Cefotaxime | >256 | >256 | >256 | >256 |
| Cefoxitin | 2 | 12 | 4 | 12 |
| Ceftazidime | 32 | >256 | >256 | >256 |
| Cefuroxime | >256 | >256 | >256 | >256 |
| Ciprofloxacin | >32 | >32 | >32 | >32 |
| Colistin | 0.002 | 2 | 0.064 | 1.5 |
| Ertapenem | 0.0125 | 0.75 | 0.064 | 0.5 |
| Gentamicin | 1 | 16 | 0.5 | >256 |
| Imipenem | 0.125 | 0.75 | 0.125 | 0.25 |
| Meropenem | 0.094 | 0.125 | 0.047 | 1 |
| Piperacillin-tazobactam | 0.75 | >256 | 0.5 | >256 |
| Tigecycline | 0.5 | 1.5 | 0.125 | 1 |