Seroprevalence and risk factors of and infection in black goats in Yunnan Province, Southwestern China.

and are two obligate intracellular protozoan parasites that can cause reproductive failure and production losses. To date, there is no data of and seroprevalence in black goats in Yunnan Province, southwestern China. In the present study, a total of 734 serum samples were collected from black goats in four different counties of Yunnan Province. 734 and 590 serum samples were examined for antibodies against and by using MAT and indirect ELISA, respectively. A total of 123 and 76 samples were positive and -positive, respectively. The overall seroprevalence of in black goats was 16.76% (123/734, 95% CI: 14.06-19.46) with the titer ranged from 1:25 to 1:3200. The seroprevalence of was 12.88% (76/590, 95% CI: 10.18-15.58). There was significant difference in seroprevalence of in different regions ( < 0.01, χ = 30.63) and age groups ( < 0.05, χ = 11.85). Significant differences in seroprevalence of were observed in different regions ( < 0.05, χ = 9.21) and different gender groups ( < 0.01, χ = 12.29). Results of seroprevalence of and indicated that and were prevalent parasites in black goats in Yunnan Province. This is the first report of seroprevalence of and in black goats in Yunnan Province. The results of this study indicated that some measures should be taken to control these two parasites and to reduce economic losses to the livestock industry in Yunnan Province.