Table 5 Age distribution of Escherichia coli F17 and F17 + stx1 virulence genes detected from pre-weaned Korean native calves
| Age (days) | F17 (positive) | F17 + stx1 (positive) | ||||
|---|---|---|---|---|---|---|
| OR | P value | 95% CI | OR | P value | 95% CI | |
| 1–20 (ref.) | 1.00 | – | – | 1.00 | – | – |
| 21–40 | 2.62 | < 0.001 | 1.79–3.84 | 2.48 | 0.273 | 0.49–12.57 |
| 41–60 | 2.44 | <0.001 | 1.57–3.81 | 7.70 | 0.005 | 1.86–31.95 |