Table-4.
Antibiogram of 12 ESBL-producing E. coli strains isolated from bovine milk samples in West Bengal, India.
| Sl. No. | Antimicrobials (Conc. in µg) | Isolates sensitive | Isolates intermediately sensitive | Isolates resistant |
|---|---|---|---|---|
| n (%) | n (%) | n (%) | ||
| 1. | Amikacin (30) | 2 (16.67) | 3 (25.00) | 7 (58.33) |
| 2. | Amoxicillin/Clavulanic acid (20/10) | 2 (16.67) | 0 (0) | 10 (83.33) |
| 3. | Colistin (10) | 12 (100) | 0 (0) | 0 (0) |
| 4. | Cotrimoxazole (25) | 5 (41.67) | 4 (33.33) | 3 (25.00) |
| 5. | Cefotaxime (30) | 0 (0) | 0 (0) | 12 (100) |
| 6. | Ceftazidime (30) | 0 (0) | 1 (8.33) | 11 (91.67) |
| 7. | Imipenem (10) | 8 (66.67) | 4 (33.33) | 0 (0) |
| 8. | Gentamicin (10) | 0 (0) | 5 (41.67) | 7 (58.33) |
| 9. | Levofloxacin (5) | 10 (83.33) | 2 (16.67) | 0 (0) |
| 10. | Pipercillin-Tazobactam (100/10) | 2 (16.67) | 10 (83.33) | 0 (0) |
| 11. | Azithromycin (30) | 4 (33.33) | 3 (25.00) | 5 (41.67) |
| 12. | Tetracycline (30) | 2 (16.67) | 1 (8.33) | 9 (75.00) |
ESBL=Extended-spectrum beta-lactamase, E. coli=Escherichia coli