Table 3.
Antimicrobial resistance profiles of isolated E. coli O157:H7 from Haramaya University and Adele Poultry Farms.
| Antimicrobial agents | Disc potency (µg) | Number of isolates | Susceptible N (%) | Intermediate N (%) | Resistant N (%) |
|---|---|---|---|---|---|
| Amoxicillin | 20 | 26 | 7 (26.92) | 10 (38.46) | 9 (34.61) |
| Ampicillin | 10 | 26 | 0 (0.0) | 2 (7.69) | 24 (92.30) |
| Cefoxitin | 30 | 26 | 2 (7.69) | 2 (7.69) | 22 (84.61) |
| Chloramphenicol | 30 | 26 | 25 (96.15) | 0 (0.0) | 1 (3.84) |
| Ciprofloxacin | 5 | 26 | 27 (100) | 0 (0.0) | 0 (0.0) |
| Clindamycin | 30 | 26 | 0 (0.0) | 1 (3.84) | 25 (96.15) |
| Erythromycin | 15 | 26 | 1 (3.84) | 0 (0.0) | 25 (96.15) |
| Gentamycin | 10 | 26 | 23 (88.46) | 1 (3.84) | 2 (7.69) |
| Kanamycin | 30 | 26 | 10 (38.46) | 12 (46.15) | 4 (15.38) |
| Nalidixic acid | 30 | 26 | 16 (61.53) | 3 (11.53) | 6 (23.07) |
| Spectinomycin | 30 | 26 | 18 (69.23) | 8 (30.76) | 0 (0.0) |
| Streptomycin | 10 | 26 | 17 (65.38) | 0 (0.0) | 9 (34.61) |
| Tetracycline | 30 | 26 | 2 (7.69) | 4 (15.38) | 20 (76.92) |
| Trimethoprim | 5 | 26 | 24 (92.30) | 0 (0.0) | 2 (7.69) |