Human cystic echinococcosis in two Mongolian communities in Hobukesar (China) and Bulgan (Mongolia)
AIM: To investigate the prevalence of human cystic echinococcosis ( CE) in traditional Mongolian communities in western Mongolia and Xinjiang (northwest China). METHODS: Studies were carried out between 1995 and 2000 on two ethnically identical populations in Hobukesar ( China) and Bulgan ( Mongolia) . RESULTS: The prevalence of human hepatic CE in the two communities was significantly different. In Hobukesar, human CE prevalence by ultrasound was 2.7% (49/1844) , while in Bulgan, it was 0. 2% (4/1609 ) (P < 0. 001). Surveys on dogs showed that coproantigen positivity rates or dog necropsy positivity rates were similar in both communities (35. 0% in Hobukesar and 35. 7% in Bulgan). But the proportions of herdsmen or farmers, dog ownership and livestock ownership, and families practicing home slaughter recorded in Hobukesar (48. 5% , 56% and 78. 9% , respectively) were significantly higher than those record in Bulgan (9.6% , 25-27% and 28.1% , respectively). CONCLUSION: The lower proportion of dog ownership may explain the lower prevalence of human CE in the Bulgan population.