title: High seroprevalence of Chlamydia infection in sows in Hunan province, subtropical China.
abstract: Chlamydia spp. are Gram-negative obligate intracellular bacteria, which are responsible for significant public health problems in humans and have major economic impact on animals. In the present study, the seroprevalence of Chlamydia infection in sows in Hunan province, subtropical China, was examined using indirect hemagglutination assay (IHA). Antibodies to Chlamydia were detected in 747 of 1,191 (62.7%, 95% CI 60-65.5) serum samples (IHA titer ≥ 1:16). The Chlamydia seroprevalence ranged from 35% (95% CI 25.7-44.4) to 77.1% (95% CI 69.1-85.2) among different regions in Hunan province, and the differences were statistically significant (P < 0.01). In addition, the seroprevalence of Chlamydia infection in sows was higher in summer (75.7%, 95% CI 71.3-80) and spring (63.2%, 95% CI 57.5-68.8) than in autumn (56.9%, 95% CI 51.5-62.3) and winter (48.6%, 95% CI 42-55.3), and the differences were statistically significant (P < 0.01). The results of the present investigation indicated the high seroprevalence of Chlamydia infection in sows in Hunan province, subtropical China, which poses a potential risk for human infection with Chlamydia in this province. This is the first report of Chlamydia seroprevalence in sows over the last two decades in Hunan province, subtropical China.
authors: State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, Gansu Province, 730046, People's Republic of China.
authors: Xiao-Xuan
authors: XX
authors: Zhang
authors: Run-Cheng
authors: RC
authors: Li
authors: Guo-Hua
authors: GH
authors: Liu
authors: Wei
authors: W
authors: Cong
authors: Hui-Qun
authors: HQ
authors: Song
authors: Xing-Long
authors: XL
authors: Yu
authors: Xing-Quan
authors: XQ
authors: Zhu
mesh_terms: D000818:Animals; D000907:Antibodies, Bacterial / Q000097:blood; D002681:China / Q000453:epidemiology; D002689:Chlamydia / Q000276:immunology; D002690:Chlamydia Infections / Q000453:epidemiology / Q000382:microbiology / Q000662:veterinary*; D002980:Climate; D005260:Female; D006801:Humans; D012621:Seasons; D016036:Seroepidemiologic Studies; D013552:Swine; D013553:Swine Diseases / Q000097:blood / Q000453:epidemiology* / Q000382:microbiology
chemical_list: D000907:Antibodies, Bacterial