TABLE 4.
Comparison of mean zone diameters between (i) Salmonella isolates with at least one AMR gene that has been known to confer resistance to a particular antimicrobial (ARG) and (ii) isolates with no genes known to confer resistance to that antimicrobiala
| Antimicrobial | 95% CI of MZDa (cm) |
|
|---|---|---|
| ARG absent | ARG present | |
| Aminopenicillins | ||
| Ampicillin | 25.4–25.6 | 0.0–0.02 |
| Amoxicillin-clavulanic acid | 13.9–18.7 | 9.2–11.0 |
| Chloramphenicol | 24.4–27.6 | 0.02–1.45 |
| Cephalosporins | ||
| Ceftiofur | 25.5–29.5 | 12.7–14.5 |
| Ceftriaxone | 29.7–34.5 | 13.4–15.5 |
| Cefoxitin | 23.2–27.5 | 8.4–10.2 |
| Streptomycin | 13.9–21.1 | 3.1–5.3 |
| Sulfonamides | ||
| Sulfisoxazole | 22.4–26.2 | 0.0–0.9 |
| Sulfamethoxazole-trimethoprim | 23.8–25.8 | 0–3.3 |
| Tetracycline | 19.0–26.5 | 2.0–4.2 |
a
MZD, mean zone diameter; CI, confidence interval. All P values were <0.0001.