Comparative Seroepidemiological Study of Brucellosis in Sheep under Smallholder Farming and Governmental Breeding Ranches of Central and North East Ethiopia

Table 4

Individual level and flock level seroprevalence of brucellosis in the small holder sheep in relation to study areas and agroecology.

Zones	Districts	Individuals tested	Positive sera (%)	X^2 (P)	95% CI	Flocks tested	Positive sera (%)	X^2 (P)	95% CI
North Shewa		446	11 (2.3)		1.02-3.51	139	11 (7.91)		5.21-10.0
	Lalo Mider	225	6 (2.67)			73	7 (9.58)
	Angolela	221	5 (2.26)			65	5 (7.69)
South Wollo		901	55 (6.1)		4.83-7.41	75	25 (33.3)		28.53-40.1
	Legambo	515	22 (4.27)			36	11 (30.5)
	Were Ilu	386	33 (8.54)			38	14 (36.8)
North Wollo		459	42 (9.55)		7.91-12.4	52	17 (32.7)		27.21-37.0
	Delenta	294	23 (7.8)			27	10 (37.03)
	Guba Lafto	165	19 (11.51)			25	7 (28)
Total		1838	108 (5.87)	47 (0.00)	4.63-7.31	266	53 (19.9)	65.7 (0.00)	16.4-25.8
Agroecology
Highland		1287	58 (4.5)		2.71-5.03	201	34 (16.9)		12.0-19.14
Midland		551	50 (9.07)		7.54-11.7	65	19 (29)		25.01-34.1
Total		1838	108 (5.87)	14.7 (0.001)	3.46-7.05	266	53 (19.9)	25.8 (0.012)	15.81-24.6