Abstract: From November 2017 to April 2018, 350 Anser erythropus faecal samples and 350 sympatric poultry duck faece samples were collected and detected with saturated brine floating and centrifugal sedimentation methods in Shengjin Lake. Parasite community structure and prevalence 13 parasites were observed from 350 wintering Anser erythropus faecal samples, about 67.4% showed parasitic infection. Eleven parasites were observed from 350 poultry duck faecal samples with the infection rate of 70.1%, and considerable differences were found in the infection intensity among parasite species. The most abundant species were coccidian oocysts, followed by Nematode and Trematode, while Cestode made a rare appearance in Anser erythropus and poultry duck. Most positive samples contained one or two species of parasites, samples with a single species of parasites were more common than those containing two or more. Examination of Anser erythropus and the poultry duck samples collected from Shengjin Lake revealed that some parasites were recorded in other waterbirds and poultry birds. The similarity coefficient between Anser erythropus population and the poultry duck population was 0.43. It might be the similar diets, high population densities and niche overlap leading to the similar parasite community of Anser erythropus population and the poultry duck in Shengjin Lake, this similarity coefficient might pose potential hazards to cross transmission between Anser erythropus population and the poultry duck population. The similarity of parasitic community structures in the wintering Anser erythropus and poultry bird populations, suggested that parasitic epidemic was more sensitive in the overwintering period in the Shengjin Lake, and might also cause human disease, even cause potential public health risks.

Key words: intestinal parasite, diversity, Anser erythropus, zoonosis, cross infection