Table 1. Prevalence of Coxiella burnetii in 736 cattle at national breeding stock farms in South Korea during 2014.
| Group | No. tested | No. of cattle ELISA-positive | 95% CIa | p-value | No. of cattle PCR-positive | 95% CIa | p-value | |
|---|---|---|---|---|---|---|---|---|
| Region | Northern | 180 | 8 (4.4) | 1.4–7.5 | < 0.0001 | 0 | 0 | 0.2041 |
| Central | 250 | 22 (8.8) | 5.3–12.3 | 4 (1.6) | 0.1–3.2 | |||
| Southern | 165 | 17 (10.3) | 5.7–14.9 | 3 (1.8) | 0–3.9 | |||
| Jeju Island | 141 | 30 (21.3) | 14.5–28.0 | 4 (2.8) | 0.1–5.6 | |||
| Breed | Brown cattle | 523 | 35 (6.7) | 4.6–8.8 | < 0.0001 | 6 (1.2) | 0.2–2.1 | 0.1294 |
| Dairy cattle | 155 | 27 (17.4) | 11.5–23.4 | 3 (1.9) | 0–4.1 | |||
| Black cattle | 48 | 13 (27.1) | 14.5–39.7 | 1 (2.1) | 0–6.1 | |||
| Tiger cattle | 10 | 2 (20.0) | 0–44.8 | 1 (10.0) | 0–28.6 | |||
| Sex | Female | 581 | 75 (12.9) | 10.2–15.6 | < 0.0001 | 10 (1.7) | 0.7–2.8 | 0.3266 |
| Male | 155 | 2 (1.3) | 0–3.1 | 1 (0.6) | 0–1.9 | |||
| Age | <3 | 104 | 2 (1.9) | 0–4.6 | < 0.0001 | 0 | 0 | 0.2946 |
| 3–5 | 355 | 24 (6.8) | 4.2–9.4 | 5 (1.4) | 0.2–2.6 | |||
| 5< | 277 | 51 (18.4) | 13.9–23.0 | 6 (2.2) | 0.5–3.9 | |||
| Total | 736 | 77 (10.5) | 8.3–12.7 | 11 (1.5) | 0.6–2.4 |
a CI = confidence interval.