Seroprevalence of Mycoplasma suis infection in pigs in eastern China as estimated by a blocking enzyme-linked immunosorbent assay
2017
Zhongyang, Liang | Jiansong, Zhang | Yijuan, Shen | Yuting, Xia | Yufeng, Li | Jiarong, Xu
Porcine infectious anemia caused by Mycoplasma suis is a global disease and results in serious economic losses. To determine the prevalence of M. suis infection in eastern China, a cross-sectional serologic study was conducted with 3458 porcine serum samples randomly obtained from January 2014 to August 2016. The samples were tested with a blocking enzyme-linked immunosorbent assay developed in our laboratory. The seroprevalence was 33.3% in the complete sample set and was 25.9%, 37.8%, and 37.8% in 2014, 2015, and 2016, respectively. The seroprevalence was distinctly higher in summer (39.9%) and autumn (42.0%) than in spring (28.9%) and winter (23.3%). Shanghai was the region with the highest seroprevalence (54.2%) and Jiangsu the region with the lowest (23.0%). The seroprevalence was markedly higher in boars (47.1%), multiparous sows (47.0%), and replacement gilts (39.2%) than in piglets (24.2%), fattening pigs (17.2%), and nursery pigs (12.5%). These data demonstrate that the prevalence of M. suis infection is increasing yearly in eastern China.
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