Ehrlichia chaffeensis and Four Anaplasma Species With Veterinary and Public Health Significance Identified in Tibetan Sheep (Ovis aries) and Yaks (Bos grunniens) in Qinghai, China

Frontiers in Veterinary Science

Jiyong Chen¹  Xueqing Han²  Ye Wang³  Heng Zhang⁴  Bo Wang⁵  Ziwen Yang⁵  Peiyang Zhang⁵  Qingxun Zhang⁶  Shuyi Han⁶  Hongxuan He⁶  Guohui Yuan⁶  Ying Li⁷  Yali Sun⁷ 

[1] Animal Disease Prevention and Control Center of Yushu, Yushu, China;Chinese Academy of Inspection and Quarantine, Beijing, China;College of Agriculture, Ningxia University, Yinchuan, China;College of Animal Science, Anhui Science and Technology University, Chuzhou, China;College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China;National Research Center for Wildlife Borne Diseases, Institute of Zoology, Chinese Academy of Sciences, Beijing, China;State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining, China;

关键词: tick-borne disease;    Anaplasma capra;    Ehrlichia chaffeensis;    Tibetan sheep;    yak;    Qinghai;   

DOI  :  10.3389/fvets.2021.727166

来源: DOAJ

【 摘 要 】

Tick-borne diseases (TBDs) can cause serious economic losses and are very important to animal and public health. To date, research on TBDs has been limited in Qinghai-Tibet Plateau, China. This epidemiological investigation was conducted to evaluate the distribution and risk factors of Anaplasma spp. and Ehrlichia chaffeensis in livestock in Qinghai. A total of 566 blood samples, including 330 yaks (Bos grunniens) and 236 Tibetan sheep (Ovis aries) were screened. Results showed that A. bovis (33.3%, 110/330) and A. phagocytophilum (29.4%, 97/330) were most prevalent in yaks, followed by A. ovis (1.2%, 4/330), A. capra (0.6%, 2/330), and E. chaffeensis (0.6%, 2/330). While A. ovis (80.9%, 191/236) and A. bovis (5.1%, 12/236) infection was identified in Tibetan sheep. To our knowledge, it is the first time that A. capra and E. chaffeensis have been detected in yaks in China. Apart from that, we also found that co-infection of A. bovis and A. phagocytophilum is common in yaks (28.2%, 93/330). For triple co-infection, two yaks were infected with A. bovis, A. phagocytophilum, and A. capra, and two yaks were infected with A. bovis, A. phagocytophilum, and E. chaffeensis. Risk analysis shows that infection with A. bovis, A. phagocytophilum, and A. ovis was related to region and altitude. This study provides new data on the prevalence of Anaplasma spp. and E. chaffeensis in Qinghai, China, which may help to develop new strategies for active responding to these pathogens.

【 授权许可】

Unknown