Research Article
Occurrence of Virulence Genes and Antimicrobial Resistance of E. coli O157:H7 Isolated from the Beef Carcass of Bahir Dar City, Ethiopia
Table 4
Antimicrobial susceptibility profile of E. coli O157:H7 isolated from carcass swab samples.
| Drugs | Concentration (µg) | Frequency of resistance and susceptible E. coli O157:H7 isolates | Resistant | Intermediate | Susceptible |
| Oxytetracycline | 30 | 0 (0%) | 0 (0%) | 25 (100%) | Tetracycline | 30 | 0 (0%) | 0 (0%) | 25 (100%) | Sulphonamides | 30 | 0 (0%) | 0 (0%) | 25 (100%) | Ampicillin | 10 | 0 (0%) | 0 (0%) | 25 (100%) | Ciprofloxacin | 5 | 0 (0%) | 0 (0%) | 25 (100%) | Neomycin | 10 | 0 (0%) | 0 (0%) | 25 (100%) | Clindamycin | 10 | 25 (100%) | 0 (0%) | 0 (0%) | Trimethoprim | 5 | 3 (12%) | 0 (0%) | 22 (88%) | Norfloxacin | 10 | 0 (0%) | 0 (0%) | 25 (100%) | Streptomycin | 25 | 0 (0%) | 3 (12%) | 22 (88%) | Chloramphenicol | 10 | 0 (0%) | 0 (0%) | 25 (100%) |
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