TABLE 1.
MICs of β-lactams against strains
| E. coli strain | MIC (μg/ml)a
|
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| AMX | AMX + CLA | TIC | TIC + CLA | AMP | AMP + SUL | PIP | PIP + TZB | CEF | CFZ | FOX | |
| BM4511, blaTEM-103 | >1,024 | 64 | >1,024 | 64 | >1,024 | 32 | 64 | 16 | 8 | 4 | 4 |
| JM83 | 8 | 8 | 4 | 4 | 8 | 4 | 2 | 2 | 4 | 2 | 2 |
| JM83 (pIP845), blaTEM-103 | >1,024 | 32 | >1,024 | 32 | >1,024 | 32 | 64 | 8 | 8 | 4 | 4 |
| TOP10 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 1 | 2 |
| TOP10 (pAT779), blaTEM-103 | >1,024 | 1,024 | >1,024 | >1,024 | >1,024 | >1,024 | 128 | 16 | 16 | 8 | 4 |
a
AMP, ampicillin; AMX, amoxicillin; CEF, cephalothin; CFZ, cefazolin; CLA, clavulanic acid (2 μg/ml); FOX, cefoxitin; PIP, piperacillin; SUL, sulbactam (8 μg/ml); TIC, ticarcillin; TZB, tazobactam (4 μg/ml).