Table 6.
The five proportional odds cumulative logit models depicting the association between year of isolation and the changes in the minimum inhibitory concentrations (MICs) of five antimicrobial agents among Streptococcus uberis (n = 228) associated with bovine mastitis in northern Thailand during 2010–2017.
| MICs outcome | Coefficients | Standard error | Odds ratio (OR) | 95% confidence interval of OR | P-value |
|---|---|---|---|---|---|
| Ceftiofur | 0.31 | 0.07 | 1.36 | 1.19–1.55 | <0.001 |
| Tetracycline | 0.21 | 0.09 | 1.24 | 1.04–1.47 | 0.014 |
| Erythromycin | −0.04 | 0.10 | 0.96 | 0.78–1.17 | 0.663 |
| Gentamicin | −0.01 | 0.06 | 0.99 | 0.88–1.13 | 0.922 |
| Penicillin G | 0.25 | 0.07 | 1.29 | 1.12–1.48 | <0.001 |