TABLE 4.
Elevation of MICs of nine β-lactams for integrants
| Strain | MIC (μg/ml)a
|
||||||||
|---|---|---|---|---|---|---|---|---|---|
| PEN | PCV | AMP | OXA | CFZ | FEP | CTX | ZOX | MEM | |
| S. pneumoniae ATCC 49619 | 0.5 | 0.5 | 0.12 | 2 | 1 | 0.25 | 0.12 | 0.5 | 0.12 |
| S. agalactiae ATCC 12403 | 0.06 | 0.06 | 0.12 | 0.25 | 0.25 | 0.25 | 0.06 | 0.25 | 0.06 |
| S. agalactiae ATCC BAA-611 | 0.06 | 0.06 | 0.12 | 0.25 | 0.12 | 0.12 | 0.06 | 0.25 | 0.06 |
| ATCC BAA-611 (B12 PBP 2X) | 0.5 | 0.5 | 0.12 | 4 | 2 | 0.5 | 0.5 | 32 | 0.12 |
| ATCC BAA-611 (B503 PBP 2X) | 0.25 | 0.12 | 0.25 | 2 | 0.5 | 0.5 | 0.12 | 16 | 0.12 |
| S. agalactiae B12 | 0.5 | 0.5 | 0.12 | 4 | 2 | 1 | 1 | 32 | 0.12 |
| S. agalactiae B503 | 0.25 | 0.12 | 0.25 | 2 | 0.5 | 0.5 | 0.12 | 16 | 0.12 |
a
Abbreviations: PEN, penicillin G; PCV, penicillin V; AMP, ampicillin; OXA, oxacillin; CFZ, cefazolin; FEP, cefepime; CTX, cefotaxime; ZOX, ceftizoxime; MEM, meropemem.