Seroprevalence and Associated Risk Factors of Leptospira interrogans Serogroup Sejroe Serovar Hardjo in Dairy Farms in and around Jimma Town, Southwestern Ethiopia
Table 2
Univariable logistic regression analysis of risk factors associated with L. hardjo seropositivity at individual animal level.
Risk factors
Categories
No tested
No. of positives
Preval. (%)
OR (95% CI)
value
Age
0.5–<3years
162
28
17.28
Ref
3–6years
122
34
27.87
1.85 (1.05–3.26)
0.034
>6years
100
32
32.00
2.25 (1.25–4.04)
0.007
Breed
Local
76
23
30.26
1.45 (0.83–2.53)
0.19
Exotic
308
71
23.05
Ref
Parity
0 parity
157
31
19.75
Ref
1–2
126
35
27.78
1.56 (0.90–2.72)
0.11
3
49
13
26.53
1.47 (0.70–3.09)
0.31
>3
52
15
28.85
1.65 (0.80–3.38)
0.17
Mgt. system
Intensive
282
48
17.02
Ref
S/intensive
102
46
45.09
4.00 (2.43–6.60)
0.001
Hyg. status
Clean
201
34
16.92
Ref
Not clean
183
60
32.79
0.42 (0.26–0.68)
0.001
Herd size
Small
114
18
15.79
Ref
Medium
139
30
21.58
1.47 (0.77–2.80)
0.244
Large
131
46
35.11
2.89 (1.56–5.36)
0.001
Total
384
94
24.48
OR = odds ratio, CI = confidence interval, Ref = reference.
