Table 1 Antibiotic susceptibility profiles of the blaCTX-M ESBL-positive E. coli and K. pneumoniae.
Antibiotics | MIC (μg/ml) for the blaCTX-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 |