Table 3.
Antimicrobial susceptibility patterns among the investigated E. coli isolates in relation to the geographical location of the tested broiler farms.
| Antimicrobial Agents § | No. (%) of E. coli Isolates | |||||
|---|---|---|---|---|---|---|
| Rajshahi (n = 200) | Dhaka (n = 200) | Overall (n = 400) | ||||
| Susceptible | Non-Susceptible | Susceptible | Non-Susceptible | Susceptible | Non-Susceptible | |
| Colistin | 160 (80) | 40 (20) | 134 (67) | 66 (33) | 294 (73.5) | 106 (26.5) |
| Gentamicin | 102 (51) | 98 (49) | 94 (47) | 106 (53) | 196 (49.0) | 204 (51.0) |
| Levofloxacin | 53 (26.5) | 147 (73.5) | 15 (7.5) | 185 (92.5) | 68 (17.0) | 332 (83.0) |
§ All the tested E. coli isolates (whether from Rajshahi or Dhaka divisions) were fully resistant to ampicillin, tetracycline, streptomycin, ciprofloxacin, erythromycin, and trimethoprim-sulphamethoxazole. Resistant and intermediately-resistant isolates are collectively referred to as non-susceptible.