Table 3.
Sensitivity of isolates to β-lactam antibioticsa.
| Strain | MIC (μg/ml) |
||||||
|---|---|---|---|---|---|---|---|
| PENG | AMP | AMO | CAR | PIP | CEFL | CEFD | |
| S1 | 250 | >500 | 250 | >500 | 500 | 500 | 250 |
| S2 | >500 | >500 | 500 | >500 | 250 | 500 | 500 |
| S17 | >500 | >500 | >500 | >500 | >500 | >500 | >500 |
| M1 | 125 | >500 | 64 | >500 | >500 | 250 | 125 |
| M2 | >500 | >500 | >500 | >500 | >500 | >500 | >500 |
| M6 | 500 | >500 | 500 | 500 | 250 | 32 | 8 |
| E. coli EPI300 | 32 | 16 | 8 | 16 | 8 | 16 | 16 |
a Penicillin G (PENG); ampicillin (AMP); amoxicillin (AMO); carbenicillin (CAR); piperacillin (PIP); cefalexin (CEFL); cefadroxil (CEFD). The MIC (minimum inhibitory concentration) was defined as the lowest concentration of antibiotics at which the organism showed no visible growth.