Table 2.
Association between settlement altitude and Anaplasma ovis infection in adult ewes from settlements in southern Kazakhstan.
| Altitude (masl) | No. of settlements | No. of settlements (%) with positive ewes | Ewes | % of positive ewes (95% CI) | Odds ratio (95% CI) | p-value | |
|---|---|---|---|---|---|---|---|
|
| |||||||
| No. of tested | No. of positive | ||||||
| <200 | 20 | 18 (90) | 623 | 284 | 45.6 (41.6–49.6)a | 1.6 (1.3–1.9) | <0.0001 |
| 200–500 | 20 | 18 (90) | 580 | 265 | 45.7 (41.6–49.8)a | 1.6 (1.3–1.9) | <0.0001 |
| >500 | 37 | 32 (86) | 1350 | 468 | 34.7 (32.1–37.3)b | Reference | |
CI=Confidence interval. a,bValues with different superscripts are significantly different (p < 0.0001)