Table 3. MIC values of β-lactams for K. oxytoca NUBL1520-1531, E. coli HB101 (pKOB23), and E. coli HB101 (pMK16) determined using the agar dilution method.
| Clinical isolates, Strains | MICs [μg/ml] | ||||
|---|---|---|---|---|---|
| AMP | PIP | TZP | CTX | IPM | |
| NUBL 1520 | >128 | >128 | >128 | 8 | 0.5 |
| NUBL 1521 | >128 | >128 | >128 | 16 | 1 |
| NUBL 1522 | >128 | >128 | >128 | 4 | 0.25 |
| NUBL 1523 | >128 | >128 | >128 | 4 | 0.12 |
| NUBL 1524 | >128 | >128 | >128 | 4 | 0.12 |
| NUBL 1525 | >128 | >128 | >128 | 2 | 0.12 |
| NUBL 1526 | >128 | >128 | >128 | 2 | 0.12 |
| NUBL 1527 | >128 | >128 | >128 | 4 | 0.5 |
| NUBL 1528 | >128 | >128 | >128 | 4 | 0.25 |
| NUBL 1529 | >128 | >128 | >128 | 4 | 0.25 |
| NUBL 1530 | >128 | >128 | >128 | 2 | 0.12 |
| NUBL 1531 | >128 | >128 | >128 | 4 | 0.25 |
| E. coli HB101 (pKOB23) | >128 | >128 | >128 | 8 | 0.25 |
| E. coli HB101 (pMK16) | 8 | 4 | 1 | 0.06 | 0.25 |
Abbreviations: MIC, minimum inhibitory concentration; AMP, ampicillin; PIP, piperacillin; TZP, piperacillin-tazobactam; CTX, cefotaxime; IPM, imipenem.