Table 1.
Descriptive results and the relationship between potential risk factors and Brucella seropositivity at herd level (n = 443) using univariable logistic regression analyses
| Variable | Category | Number (%) | Seropositive number (%) | P value |
|---|---|---|---|---|
| Number of cows | 0.05a | |||
| 1 and 2 | 326 (74) | 9 (3) | Reference | |
| 3 and 4 | 81 (18) | 5 (6) | 0.9 | |
| ≥5 | 36 (8) | 4 (11) | 0.08 | |
| Number of cattle | 0.06a | |||
| 1 and 2 | 121 (27) | 1 (1) | Reference | |
| 3 and 4 | 167 (38) | 7 (4) | 0.7 | |
| 5–7 | 100 (23) | 4 (4) | 0.8 | |
| ≥8 | 55 (12) | 6 (11) | 0.007 | |
| Sheep/goats | Yes | 90 (20) | 5 (6) | 0.4a |
| No | 353 (80) | 13 (4) | ||
| Pasture type | 0.1a | |||
| Communal grazing | 207 (47) | 12 (6) | ||
| Limited pasture/tethered | 226 (51) | 5 (2) | ||
| Zero grazing | 10 (2) | 1 (10) | ||
| Purchase new cattle | Yes | 45 (10) | 2 (4) | 0.9a |
| No | 398 (90) | 16 (4) | ||
| Abortion | Yes | 17 (4) | 3 (18) | 0.01a |
| No | 426 (96) | 15 (4) |
aLikelihood ratio test