Liang Lin, Wen Yuan, Li Zhaocai, Liu Ping, Liu Xing, Tan Shuming, Liu Donghui, Zhou Jizhang, Tong Dewen
College of Veterinary Medicine, Northwest A&F University, 712100, Yangling, China.
State Key Laboratory of Veterinary Etiological Biology, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, 730046, Lanzhou, China.
Ir Vet J. 2021 Jun 30;74(1):19. doi: 10.1186/s13620-021-00199-x.
Chlamydia spp. are prevalent zoonotic pathogens that infect a wide variety of host species. Chlamydia abortus (C. abortus) infection in yaks has been reported in Gansu and Qinghai province, China. However, no data about C. abortus infection are available in yaks in Tibet, China. A total of 938 serum samples was collected from yaks in Tibet, China and specific antibodies against C. abortus were detected by the enzyme-linked immunosorbent assay (ELISA). The results showed that the overall seroprevalence of C. abortus in yaks was 104/938 (11.1 %, 95 % confidence interval [CI] 9.1-13.1). The prevalence in female and male yaks was 59/556 (10.6 %, 95 % CI 8.0-13.2) and 45/382 (11.8 %, 95 % CI 8.5-15.0), respectively with no significant difference (p > 0.05). The seroprevalence of antibodies to C. abortus in yaks ranged from 8.0 to 18.2 % among the six different areas, and the difference was also without statistical significance (p > 0.05). The prevalence among different age groups ranged from 7.0 to 15.9 %, with a higher prevalence among 1 to 2 years age category. The results demonstrate the presence of C. abortus infection in yaks in Tibet and may pose a risk for the general yak populations in addition to its potential impact on public health and the local Tibetan economy. To our knowledge, this is the first seroprevalence survey of C. abortus in yaks in Tibet, China.
衣原体属是普遍存在的人畜共患病原体，可感染多种宿主物种。中国甘肃和青海省已报道牦牛感染流产衣原体（C. abortus）。然而，中国西藏牦牛中尚无关于流产衣原体感染的数据。从中国西藏牦牛中总共采集了938份血清样本，并通过酶联免疫吸附测定（ELISA）检测了针对流产衣原体的特异性抗体。结果显示，牦牛中流产衣原体的总体血清阳性率为104/938（11.1%，95%置信区间[CI] 9.1 - 13.1）。雌性和雄性牦牛的感染率分别为59/556（10.6%，95% CI 8.0 - 13.2）和45/382（11.8%，95% CI 8.5 - 15.0），无显著差异（p > 0.05）。在六个不同地区，牦牛中流产衣原体抗体的血清阳性率在8.0%至18.2%之间，差异也无统计学意义（p > 0.05）。不同年龄组的感染率在7.0%至15.9%之间，1至2岁年龄组的感染率较高。结果表明中国西藏牦牛中存在流产衣原体感染，这除了可能对公众健康和当地藏族经济产生潜在影响外，还可能对整个牦牛种群构成风险。据我们所知，这是中国西藏牦牛中首次进行的流产衣原体血清阳性率调查。
