Table 3.
Distribution of carbapenemase- and extended-spectrum-beta-lactamase-encoding genes of Escherichia coli isolated from surface swab, sewage, and housefly samples at Jimma.
| Types of Antimicrobial Resistance Gene | Surface Swab (n = 10) |
Housefly (n = 20) |
Sewage (n = 36) |
Total | |
|---|---|---|---|---|---|
| (n = 66) | % | ||||
| Carbapenemase encoding genes | 1 | 5 | 0 | 6 | 5.6 |
| NDM | 1 | 5 | 0 | 6 | 5.6 |
| ESBL encoding genes | 8 | 18 | 15 | 41 | 37.9 |
| CTX-M group 1 type-15 | 6 | 15 | 11 | 33 | 30.6 |
| CTX-M group 1 type-9 | 2 | 0 | 2 | 3 | 2.7 |
| CTX-M group 1, ND * | 0 | 1 | 2 | 3 | 2.8 |
| CTX-M group 1 type-15 + 9 | 0 | 2 | 0 | 2 | 1.8 |
| AMPC encoding genes | 3 | 2 | 1 | 6 | 5.6 |
| CMY II (n = 11) | 0 | 1 | 0 | 1 | 0.9 |
| ACT/MIR (n = 10) | 3 | 0 | 0 | 3 | 2.8 |
| DHA (n = 5) | 0 | 1 | 1 | 2 | 1.9 |
| TEM/SHV encoding genes | 3 | 11 | 23 | 37 | 34.3 |
| blaTEM- (WT) (n = 144) | 3 | 11 | 22 | 36 | 33.4 |
| blaTEM-104K + 164C (n = 1) | 0 | 0 | 1 | 1 | 0.9 |
Key: *—no specified CTX-M group-1, subtype enzymes.