TABLE 2.
Antimicrobial resistance of Salmonella isolates
| Antimicrobial | No. (%) resistant isolates of the following serovars:
|
|||||
|---|---|---|---|---|---|---|
| All serovars | Copenhagen | Typhimurium | Derby | Heidelberg | All other serovars | |
| Tetracycline | 1,059 (84.2) | 400 (95.9) | 171 (96.6) | 264 (86.8) | 86 (96.6) | 138 (51.1) |
| Ampicillin | 599 (47.6) | 385 (92.3) | 170 (96.0) | 33 (10.9) | 2 (2.2) | 9 (4.1) |
| Piperacillin | 462 (36.7) | 355 (85.1) | 89 (50.3) | 8 (2.6) | 2 (2.2) | 8 (3.6) |
| Amoxicillin-clavulanic acid | 402 (32.0) | 350 (83.9) | 36 (20.3) | 7 (2.3) | 2 (2.2) | 7 (3.2) |
| Chloramphenicol | 383 (30.5) | 329 (78.9) | 8 (4.5) | 35 (11.5) | 5 (5.6) | 6 (12.2) |
| Gentamicin | 38 (3.0) | 3 (0.7) | 1 (0.6) | 30 (9.9) | 0 | 4 (1.5) |
| Cephalothin | 18 (1.4) | 6 (1.4) | 7 (3.9) | 1 (0.3) | 0 | 4 (1.5) |
| Trimethoprim-sulfamethoxazole | 15 (1.2) | 1 (0.2) | 0 | 6 (1.9) | 4 (4.5) | 4 (1.8) |