Table 2 Antimicrobial resistance pattern of E. coli isolates from chicken visceral organs
Antimicrobial class | Antimicrobial discs and concentration | E. coli isolates (n = 82) | ||
|---|---|---|---|---|
No susceptible (%) | No Intermediate (%) | No Resistant (%) | ||
Aminoglycosides | Streptomycin (10 μg) | 70 (85) | 12 (15) | 0 (0) |
Kanamycin (30 μg) | 62 (75) | 12 (15) | 8 (10) | |
Gentamicin (30 μg) | 73 (89) | 9 (11) | 0 (0) | |
Amikacin (30 μg) | 57 (69.6) | 19 (23.1) | 6 (7.3) | |
β-lactams | Amoxicillin (20 μg) | 0 (0) | 0 (0) | 82 (100) |
Cloxcillin (5 μg) | 0 (0) | 0 (0) | 82 (100) | |
Cephems | Cefuroxime (30 μg) | 0 (0) | 0 (0) | 82 (100) |
Ceftazidime (30 μg) | 69 (84.6) | 0 (0) | 13 (15.4) | |
Cefotaxime (30 μg) | 0 (0) | 6 (7.3) | 76 (92.7) | |
Phenicols | Chloramphenicol (30 μg) | 52 (63.4) | 16 (19.5) | 14 (17.1) |
Quinolones | Ciprofloxacin (5 μg) | 82 (100) | 0 (0) | 0 (0) |
Nalidxic acid (30 μg) | 68 (83) | 8 (9.7) | 6 (7.3) | |
Nitrofurans | Nitrofurantoin (10 μg) | 63 (76.8) | 1 (1.2) | 18 (23.2) |
Tetracyclines | Tetracycline (30 μg) | 44 (53.7) | 0 (0) | 38 (46.3) |
Folate pathway inhibitors | Sulfamethoxazole-trimethoprim (1.25/23.75 μg) | 82 (100) | 0 (0) | 0 (0) |
Fluoroquinolones | Norfloxacin (10 μg) | 82 (100) | 0 (0) | 0 (0) |