Table 3.
Profile of colistin-resistant Escherichia coli isolates
| Isolate | ERIC type | Specimen source | ESBL phenotype | MIC microbroth colistin (μ/mL) | MDR or XDR | mcr-1 | mcr-2, -6 |
ampC genes |
Resistance profile (Kirby-Bauer) |
|---|---|---|---|---|---|---|---|---|---|
| E.c1 | A1 | Sewage | + | 4 | MDR | — | — | + | CP, FOX, CTX |
| E.c2 | A2 | Chicken | + | 4 | — | — | — | — | CTX, AM, CAZ, FEP, CIP |
| E.c3 | A3 | Cow | + | 4 | MDR | + | — | — | XM, CTX, SXT, CP, AM, FM, FOX, CAZ, FEP |
Abbreviations: ERIC, enterobacterial repetitive intergenic consensus; ESBL, extended-spectrum β-lactamase; MRD, multidrug resistant; XDR, extensively drug resistant.