TABLE 1.
Susceptibilities of E. coli HKY322 producing TEM-91 and transconjugant to β-lactams and β-lactam-β-lactamase inhibitor combinations
| E. coli strain | MIC (μg/ml)a
|
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| AMP | CER | CAZ | CAZ-CLA 4 | CTX | CTX-CLA 4 | CPM | MOX | CMNX | ATM | IPM | |
| HKY322 | >128 | 128 | >128 | 0.5 | 4 | <0.5 | 16 | 2 | <0.5 | 32 | <0.5 |
| XL1-Blue-(pBCTEM91) | 128 | 64 | 64 | <0.5 | 1 | <0.5 | 2 | 1 | 1 | 8 | <0.5 |
| XL1-Blue | 4 | 2 | <0.5 | <0.5 | <0.5 | <0.5 | <0.5 | <0.5 | <0.5 | <0.5 | <0.5 |
a
Abbreviations: AMP, ampicillin; CER, cephaloridine; CAZ, ceftazidime; CLA, clavulanic acid; CTX, cefotaxime; CPM, cefpirome; MOX, moxalactam; CMNX, cefminox; ATM, aztreonam; IPM, imipenem. The number after “CLA” indicates concentration (micrograms per milliliter).