Table 6.
Significant results obtained from logistic regression of antimicrobial resistant Pasteurella multocida from beef-type cattle upon feedlot arrival.
| Risk factor | Ampicillin | Oxytetracycline | Spectinomycin | Tilmicosin | Tulathromycin | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OR | 95% CI | p-value | OR | 95% CI | p-value | OR | 95% CI | p-value | OR | 95% CI | p-value | OR | 95% CI | p-value | |||||||
| Monthly interval | |||||||||||||||||||||
| Aug–Nov | 1 | 1 | – | 1 | 1 | – | 1 | 1 | – | 1 | 1 | – | 1 | 1 | – | ||||||
| Dec–Feb | na | na | na | na | na | na | 1.3 | 0.1–12.5 | 0.834 | na | na | na | na | na | na | ||||||
| Mar–May | na | na | na | na | na | na | 8.5 | 1.1–65.4 | 0.040 | na | na | na | na | na | na | ||||||
| Source | |||||||||||||||||||||
| A | 1 | 1 | – | 1 | 1 | – | 1 | 1 | – | 1 | 1 | – | 1 | 1 | – | ||||||
| B | na | na | na | 13.2 | 0.002–0.1 | 0.018 | 13.4 | 1.6–113.8 | 0.017 | 21.9 | 0.7–698.5 | 0.080 | 35.9 | 1.0–1249.4 | 0.048 | ||||||
| RD | na | na | na | 1.3 | 0.2–10.4 | 0.807 | 1.8 | 0.3–11.4 | 0.545 | ||||||||||||
A, auction; B, backgrounding operations; CI, confident interval; OR, odds ratio; RD, ranch direct.
na, that variable was not significant at the p-value ≤ 0.1 level and was eliminated from the regression.
Bold p-values indicate statistically significant results at p ≤ 0.1.