Table 1.

Seroprevalence of Neospora caninum in 779 domestic sheep in Henan province, central China.

Variable	No. examined	No. positive	Prevalence (%)	X2	P-value
Region
Zhoukou	255	12	4.71	3.858	0.145
Zhumadian	272	24	8.82
Xinxiang	252	21	8.33
Gender
Male	292	18	6.16	0.915	0.339
Female	487	39	8.01
Age (years)
≤ 1	246	11	4.47	8.587	0.014
1∼2	292	19	6.51
≥ 2	241	27	11.2
Presence of dogs in the herd
Yes	359	40	11.14	14.365	< 0.001
No	420	17	4.05
Rearing system
Extensive	215	25	11.63	8.845	0.012
Semi-intensive	343	22	6.41
Intensive	221	10	4.52
Total	779	57	7.32