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.  Echinococcosis is a zoonotic parasitic disease that is highly endemic to the Qinghai province of China. Limited data are available on the prevalence of the causal pathogen,  Echinococcus  spp., in definitive hosts in this region. Thus, the aim of this study was to evaluate the prevalence of  Echinococcus  spp. in wild foxes and stray dogs in Qinghai province. Five hundred and twenty-eight feces from wild foxes and 277 from stray dogs were collected from 11 counties in the Golog, Yushu, and Haixi prefectures and screened for  Echinococcus  spp. using copro-DNA polymerase chain reaction (PCR). In total, 5.5% of wild foxes and 15.2% of stray dogs tested positive for  Echinococcus  spp. The prevalence rates of  Echinococcus  spp. in wild foxes in Golog, Yushu, and Haixi were 7.3%, 5.2%, and 1.9%, respectively. In stray dogs, these rates were 13.3%, 17.3%, and 0%, respectively. Sequencing analysis determined that  Echinococcus multilocularis  was the most prevalent species, occurring in 4.0% and 12.6% of wild foxes and stray dogs, respectively.  Echinococcus shiquicus  was observed in 1.5% of wild foxes and 0.7% of stray dogs.  Echinococcus granulosus  was observed only in wild dogs, with a prevalence rate of 1.8%. To our knowledge, this is the first report on the prevalence of  E. shiquicus  in dogs in Qinghai province. The current results improve our understanding of the transmission and dissemination of human echinococcosis and suggest that exposure to the eggs of  E. multilocularis  harbored by wild foxes and stray dogs may pose a great risk of alveolar echinococcosis to humans in Qinghai province.

Prevalence of Echinococcus Species in Wild Foxes and Stray Dogs in Qinghai Province, China