and Four Species With Veterinary and Public Health Significance Identified in Tibetan Sheep () and Yaks () in Qinghai, China.

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 spp. and in livestock in Qinghai. A total of 566 blood samples, including 330 yaks () and 236 Tibetan sheep () were screened. Results showed that (33.3%, 110/330) and (29.4%, 97/330) were most prevalent in yaks, followed by (1.2%, 4/330), (0.6%, 2/330), and (0.6%, 2/330). While (80.9%, 191/236) and (5.1%, 12/236) infection was identified in Tibetan sheep. To our knowledge, it is the first time that and have been detected in yaks in China. Apart from that, we also found that co-infection of and is common in yaks (28.2%, 93/330). For triple co-infection, two yaks were infected with , and , and two yaks were infected with , and . Risk analysis shows that infection with , and was related to region and altitude. This study provides new data on the prevalence of spp. and in Qinghai, China, which may help to develop new strategies for active responding to these pathogens.