TABLE 1.
In vitro β-lactam susceptibilities of K. oxytoca 1731 and K. pneumoniae 1734 and their transconjugants and the E. coli J53-2 recipient
| β-Lactam | MIC ( μg/ml) for:
|
||||
|---|---|---|---|---|---|
| K. oxytoca 1731 | E. coli J53-2 R+ (EC1731) | K. pneumoniae 1734 | E. coli J53-2 R+ (EC1734) | E. coli J53-2 R− | |
| Amoxicillin | 1,024 | 1,024 | 1,024 | 1,024 | 2 |
| + Clavulanate | 32 | 32 | 32 | 32 | 2 |
| Ticarcillin | ≥1,024 | ≥1,024 | ≥1,024 | ≥1,024 | 2 |
| + Clavulanate | 32 | 32 | 32 | 32 | 2 |
| Cefoxitin | 64 | 64 | 64 | 64 | 4 |
| + Clavulanate | 64 | 64 | 64 | 64 | 4 |
| Cefotaxime | 1 | 1 | 1 | 1 | ≤0.06 |
| + Clavulanate | 1 | 1 | 1 | 1 | ≤0.06 |
| Ceftazidime | 16 | 16 | 16 | 16 | 0.25 |
| + Clavulanate | 16 | 16 | 16 | 16 | 0.25 |
| Aztreonam | 4 | 1 | 4 | 1 | ≤0.06 |
| + Clavulanate | 4 | 1 | 2 | 1 | ≤0.06 |
| Cefepime | 0.12 | ≤0.06 | 0.12 | ≤0.06 | ≤0.06 |
| + Clavulanate | ≤0.06 | ≤0.06 | 0.12 | ≤0.06 | ≤0.06 |
| Imipenem | 0.12 | 0.12 | 0.12 | 0.12 | 0.12 |