Table IV.
Percent of Salmonella isolates from nursery pigs (n = 83), grow-finish pigs (n = 241), and sows (n = 144) resistant to each drug
| Percent resistant
|
|||
|---|---|---|---|
| Antimicrobial | Nursery | Grow-finish | Sow |
| Tetracyclineb | 47.0 | 27.4 | 22.9 |
| Sulfamethoxazole | 41.0 | 16.6 | 27.8 |
| Streptomycina,b | 22.9 | 8.7 | 10.4 |
| Ampicillina | 19.3 | 9.1 | 16.7 |
| Kanamycina | 16.9 | 7.9 | 15.3 |
| Chloramphenicol | 7.2 | 7.1 | 5.6 |
| Trimethoprim-sulfamethoxazole | 2.4 | 3.7 | 4.9 |
| Cephalothina | 2.4 | 0.8 | 1.4 |
| Cefoxitinc | 0.0 | 0.4 | 1.4 |
| Gentamicinc | 0.0 | 0.4 | 0.0 |
a
Significant difference between isolates from nursery and grow-finish pigs (P < 0.05).
b
Significant difference between isolates from nursery pigs and sows (P < 0.05).
c
Models did not converge because frequency of resistance was too low.