TABLE 2.
Antibiotic susceptibilities of E. coli clinical strains and their transformants
| E. coli strain or transformantb | MIC (μg/ml)a for:
|
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CRO | CAZ | FEP | TZP | AZT | IPMc | MEMc | ERTc | CIP | SXT | AMK | GEN | |
| 157 | >64 | >64 | >64 | >128 | >64 | 32 | 4 | 32 | >4 | >320 | 8 | <1 |
| T-157 | >64 | 16 | 2 | >128 | >64 | 2 | 0.5 | 1 | <0.25 | >320 | <2 | <1 |
| 329 | >64 | 16 | 8 | >128 | >64 | 32 | >32 | 32 | >4 | >320 | >64 | >16 |
| T-329 | >64 | 8 | 2 | >128 | 32 | 4 | 0.5 | 1.5 | <0.25 | <20 | <2 | <1 |
| 339 | >64 | 16 | 16 | 64 | >64 | 12 | 4 | >32 | >4 | >320 | 4 | >16 |
| T-339 | 4 | 2 | <1 | 16 | 32 | 0.5 | 0.25 | 0.25 | <0.25 | <20 | <2 | <1 |
| 360 | >64 | >64 | >64 | >128 | >64 | 8 | 4 | >32 | >4 | >320 | 32 | 2 |
| T-360 | 8 | 4 | <1 | 64 | 32 | 1 | 0.25 | 1 | <0.25 | <20 | 16 | <1 |
| DH5α | <1 | <1 | <1 | <4 | <1 | 0.19 | 0.012 | 0.006 | <0.25 | <20 | <2 | <1 |
a
CRO, ceftriaxone; CAZ, ceftazidime; FEP, cefepime; TZP, piperacillin/tazobactam; AZT, aztreonam; IMP, imipenem; MEM, meropenem; ERT, ertapenem; CIP, ciprofloxacin; SXT, trimethoprim-sulfamethoxazole; AMK, amikacin; GEN, gentamicin.
b
T, transformant.
c
The MIC for each carbapenem is the average MIC for three measurements obtained from three Etests performed independently.