Seroprevalence and Risk Factors of Small Ruminant Brucellosis in West Hararghe Zone of Oromia Regional State, Eastern Ethiopia

Table 2

Univariable logistic regression analyses of explanatory variables of small ruminant brucellosis.

Variable	Level	No. tested	CFT positive (%)	OR	95% CI for CFT	Fisher’s exact test value
District	Hirna	238	0 (0)	1.0	—	—
	Mieso	1334	4 (0.3)	1.36	0.61–3.03	0.449
	Chiro	498	1 (0.2)	1.69	0.72–3.96	0.229
Species	Sheep	1101	2 (0.18)	1.0	—	—
	Goat	969	3 (0.32)	1.37	0.89–2.11	0.153
Altitude	Highland	301	0 (0)	1.0	—	—
	Midland	408	1 (0.25)	1.17	0.43–3.14	0.759
	Lowland	1361	4 (0.3)	4.15	2.23–7.72	0.0001
Sex	Male	442	1 (0.23)	1.0	—	—
	Female	1628	4 (0.25)	1.04	0.61–1.79	0.884
Age	Young (<1 year)	469	0 (0)	1.0	—	—
	Adult (>1 year)	1601	5 (0.31)	1.53	0.86–2.74	0.152
Flock size	Small	1097	2 (0.18)	1.0	—	—
	Large	973	3 (0.31)	1.68	1.08–2.60	0.021
Production system	Sedentary	404	0 (0)	1.0	—	—
	Pastoral	1331	4 (0.3)	2.59	1.37–4.90	0.004
	Agropastoral	335	1 (0.29)	4.01	2.35–6.84	0.0001
Management	Extensive	1785	2 (0.1)	1.0	—	—
	Semi-intensive	285	3 (1)	1.02	0.54–1.90	0.959
Mixed flock	No	1002	1 (0.1)	1.0	—	—
	Yes	1068	4 (0.37)	2.11	1.33–3.36	0.002