First Report ofSeroprevalence in Slaughter Pigs in Shandong Province, Eastern China.

Abstract

, a kind of obligate intracellular Gram-negative bacteria, can infect humans and animals worldwide, including pigs. However, the information oninfection is unavailable in pigs in Shandong province, eastern China. To assess the seroprevalence and risk factors ofinfection in pigs in Shandong province, eastern China, a total of 2108 serum samples of slaughter pigs were collected between January 2017 and December 2018, and specific antibodies againstwere detected by the indirect hemagglutination assay. The overallseroprevalence was 24.15% (509/2108, 95% confidence interval: 22.32-25.97). Species, sampling regions, and rearing systems of pigs were considered as risk factors forinfection through statistical analysis by SAS analysis (&#x2009;<&#x2009;0.05). These results indicated thatis highly prevalent in slaughter pigs in Shandong province, eastern China, and may pose a potential risk for human health. To our knowledge, this is the first investigation ofseroprevalence in slaughter pigs in Shandong province, eastern China. Moreover, this is the first report to compare theseroprevalence between domestic pigs and farmed wild boars in a same study, which may provide important data for preventing and controllinginfection in pigs in China.