Table 2. Descriptive statistics and univariable analysis of risk factors associated with B. bigemina and A. marginale infections detected by RLB in cattle from Southwestern Ethiopia.
| Variable | Categories | Total No. (%) | B. bigemina | A. marginale | ||
|---|---|---|---|---|---|---|
| No. + ve (%) | p-value | No. + ve (%) | p-value | |||
| Breeds | Zebu | 371 (94.6) | 50 (13.5) | 0.194 | 47 (12.7) | <0.001* |
| Cross-bred | 21 (5.4) | 5 (23.8) | 10 (47.6) | |||
| Sex | Male | 155 (39.5) | 25 (16.1) | 0.37 | 19 (12.3) | 0.38 |
| Female | 237 (60.5) | 30 (12.7) | 38 (16.0) | |||
| Age | Calf | 51 (13.0) | 9 (17.6) | 0.70 | 5 (9.8) | 0.34 |
| Young | 120 (30.6) | 17 (14.2) | 15 (12.5) | |||
| Adult | 221 (56.4) | 29 (13.1) | 37 (16.7) | |||
| Management system | Semi-intensive | 21 (5.4) | 5 (23.8) | 0.19 | 10 (47.6) | <0.001* |
| Extensive | 371 (94.6) | 50 (13.5) | 47 (12.7) | |||
| Acaricide used | Diazinone | 170 (43.4) | 26 (15.3) | 0.28 | 32 (18.8) | 0.06 |
| Cyper/deltamethrin | 52 (13.3) | 4 (7.7) | 7 (13.5) | |||
| Amitraz | 144 (36.7) | 19 (20.2) | 18 (12.5) | |||
| Ivermectin | 26 (6.6) | 6 (23.1) | 0 (0) | |||
| Frequency of acaricide application | 1–3× per year | 329 (83.9) | 48 (14.6) | 0.09 | 40 (12.2) | <0.001* |
| 4–6× per year | 42 (10.7) | 2 (4.8) | 7 (16.7) | |||
| 6–8× per year | 21 (5.4) | 5 (23.8) | 10 (47.6) | |||
*As all the 21 cattle managed semi-intensively and sprayed four to six times per year with acaricide are the same 21 cross-bred animals in the breed category, the statistically significant association observed here was not taken as a valid association.
No.: Number, + ve: Positive.