Table 1.
Percentage of Generic Escherichia coli and Salmonella Isolates Resistant to 15 Antimicrobials
| Antimicrobial | No. of isolates resistant (% of isolates) |
|
|---|---|---|
| Escherichia coli (n = 1135) | Salmonella (n = 1495) | |
| Aminoglycosides | ||
| Gentamicin | 343 (30.2) | 31 (2.1) |
| Kanamycin | 153 (13.5) | 3 (0.2) |
| Streptomycin | 586 (51.6) | 621 (41.5) |
| β-Lactams | ||
| Amoxicillin-clavulanic acid | 406 (35.8) | 466 (31.2) |
| Ampicillin | 581 (51.2) | 484 (32.4) |
| Cefoxitin | 408 (35.9) | 463 (31) |
| Ceftiofur | 336 (29.6) | 469 (31.4) |
| Ceftriaxone | 411 (36.2) | 470 (31.4) |
| Folate pathway inhibitors | ||
| Sulfisoxazole | 650 (57.3) | 93 (6.2) |
| Trimethoprim-sulfamethoxazole | 182 (16) | 18 (1.2) |
| Macrolides | ||
| Azithromycin | 1 (0.1) | 0 (0) |
| Phenicols | ||
| Chloramphenicol | 60 (5.3) | 11 (0.7) |
| Quinolones | ||
| Ciprofloxacin | 2 (0.2) | 0 (0) |
| Nalidixic acid | 78 (6.9) | 7 (0.5) |
| Tetracyclines | ||
| Tetracycline | 523 (46.1) | 642 (42.9) |