Risk factor | Ticks | Lice | ||||
---|---|---|---|---|---|---|
Positive/total (%) | P a | OR (95% CI) | Positive/total (%) | P a | OR (95% CI) | |
Sex | 0.908 | 1.03 (0.56−1.88) | 0.260 | 0.74 (0.43−1.20) | ||
Male | 19/236 (8.0) | 49/385 (12.7) | ||||
Female | 30/385 (7.7) | 23/236 (9.7) | ||||
Age (months) | < 0.001 | b | 0.002 | d | ||
1–12 | 29/153 (18.9) | 10/153 (6.5) | ||||
13–24 | 10/222 (4.5) | 39/222 (17.5) | ||||
> 24 | 10/246 (4.0) | 23/246 (9.3) | ||||
Type | 0.209 | 1.50 (0.79−2.86) | 0.149 | 1.48 (0.86−2.53) | ||
Dairy | 35/392 (8.9) | 21/229 (9.1) | ||||
Beef | 14/229 (6.1) | 51/392 (13.0) | ||||
Herd size | 0.006 | c | 0.025 | e | ||
Micro | 12/218 (5.5) | 17/218 (7.8) | ||||
Small | 37/347 (10.6) | 51/347 (14.7) | ||||
Medium | 0/56 (0.0) | 4/56 (7.1) | ||||
Farm site | < 0.001 | 25.81 (3.53−188.50) | < 0.001 | 5.07 (2.28−11.29) | ||
Dry land | 48/420 (11.5) | 65/420 (15.4) | ||||
Floodplain | 1/201 (0.5) | 7/201 (3.4) | ||||
Origin | 0.102 | 1.88 (0.87−4.07) | 0.020 | |||
Bought | 9/70 (12.8) | 14/70 (20.0) | ||||
Born on farm | 40/551 (7.2) | 58/551 (10.5) | ||||
Maintained with other animals | 0.010 | 0.46 (0.25−0.84) | 0.249 | 1.38 (0.79–2.40) | ||
Yes | 25/420 (5.9) | 53/420 (12.6) | ||||
No | 24/201 (11.9) | 19/201 (9.4) |