文献类型： 外文期刊

作者： Liu, Xianxia ¹ ; Li, Jianjun ² ; Yang, Xueyun ² ; Wang, Dengfeng ² ; Wang, Jianmei ¹ ; Wu, Jianyong ² ;

作者机构： 1.Shihezi Univ, Coll Anim Sci & Technol, North 4th Rd, Shihezi, Peoples R China

2.Xinjiang Acad Anim Sci, Vet Res Inst, 726 Dongrong St, Urumqi, Peoples R China

关键词： Mycobacterium avium subspecies paratuberculosis;Seroprevalence;Dairy cattle;Farming mode

期刊名称：IRISH VETERINARY JOURNAL （ 影响因子：2.146； 五年影响因子：2.0 ）

ISSN： 0368-0762

年卷期： 2017 年 70 卷

页码：

收录情况： SCI

摘要： Background: Mycobacterium avium subspecies paratuberculosis (MAP) causes chronic, wasting, and progressive enteritis in cattle, bringing significant economic losses in livestock industries. MAP has spread worldwide mainly due to movement of animals. The objective of this study was to determine the MAP seroprevalence in cattle in the Xinjiang Uygur Autonomous Region, Northwest China, and evaluate the difference between intensive farming herds (cattle number in a herd is more than 200, and the cattle cannot have access to pasture) and free-range herds (the cattle are bred by individual households, a herd is defined as the cattle are bred in a village or town in this study). Results: A total of 3157 serum specimens were collected from 42 herds in nine different regions. This included 1481 specimens from 18 intensive farming herds in four regions and 1676 specimens from 24 free-range herds in six regions. Antibody against MAP was tested with commercial ELISA test kits. The results showed that the overall apparent prevalence was 4.8% (95% CI, 4.1 to 5.6%) at animal level, and 50.0% (21/42) at herd level. The apparent prevalence in intensive farming herds and free-range herds were 9.5% (141/1481) and 0.7% (11/1676) at the animal-level, 88.9%(16/18) and 20.8% (5/24) at herd level, respectively, with a significant statistical difference between these two farming modes (p < 0.01). Cattle in intensive farming herds had a relatively higher risk to be infected with MAP than those in free-range herds (RR = 14.4). Conclusion: This study demonstrates that apparent prevalence of MAP infection in dairy cattle differs with farming modes at the animal level and herd level, and farming density could be an important risk factor associated with the presence of MAP infected cattle. This study provides important epidemiological data for bovine MAP control in Xinjiang, Northwest China.