Table 5. Microbiology, Susceptibility Testing, and Molecular Mechanisms of Resistance of Carbapenem-Resistant Enterobacteriaceae Fecal Isolates.
| Isolates (n = 55) | Antibiotics (μg/mL) | Resistance Mechanism (n) | ||
|---|---|---|---|---|
| Species | Ertapenem | Meropenem | Imipenem | |
| Klebsiella pneumoniae (n = 13) | OXA-232 + CTX-M-15 (2), OXA-232 (1), KPC-1 + CTX-M-15(1), KPC-1 + SHV (1), NDM-1 + CTX-M-15 (3), Unidentified (5) | |||
| MIC 50 | 8 | 16 | 16 | |
| MIC 90 | 8 | 16 | 16 | |
| Escherichia coli (n = 40) | OXA-232 + CTX-M15 (10), OXA-232 + SHV (2), OXA-232 (1), IMP + CTX-M-15 (3), IMP(1), Unidentified (23) | |||
| MIC 50 | 8 | 2 | 1 | |
| MIC 90 | 8 | 8 | 2 | |
| Enterobacter cloacae (n = 2) | Unidentified (2) | |||
| MIC 50 | 8 | 0.75 | 0.75 | |
| MIC 90 | 8 | 1 | 1 | |
| Total (n = 55) | ||||
| MIC 50 | 8 | 2 | 1 | |
| MIC 90 | 8 | 16 | 16 | |
MIC, minimum inhibitory concentration; MIC50, minimum inhibitory concentration for 50% of the given species; MIC90, minimum inhibitory concentration for 90% of the given species.