Table. Characteristics of isolates containing CTX-M and plasmid-mediated AmpC β-lactamases.
| Isolate | Species | MIC (mg/mL)a |
|||||
|---|---|---|---|---|---|---|---|
| CAZ | FEP | CRO | AZT | pIb | Sequenced β-lactamase | ||
| EU17113 | K. pneumoniae | 4 | 4 | 128 | 2 | 7.2, 7.5, 8.0 | CTX-M-9 type |
| EU2673 | K. pneumoniae | 128 | 128 | >256 | >256 | 5.8, 7.2, 7.5, 9.0 | CTX-M-15 type |
| EU2657 | E. coli | 16 | 128 | >256 | 64 | 5.1, 6.3, 7.2, 7.5, 8.0 | CTX-M-2 type |
| EU4855 | E. coli | >256 | 4 | >256 | 64 | 8.8 | CMY-2 type |
| EB9505 | E. coli | 128 | 1 | 256 | 8 | 5.1, 8.8 | CMY-2 type |
aK. pneumoniae, Klebsiella pneumoniae; E. coli, Escherichia coli; CAZ, ceftazidime; FEP, cefepime; CRO, ceftriaxone; AZT, aztreonam. bIsoelectric points of β-lactamases.