Abstract: Objective To understand the infection status of Clonorchis sinensis and soil nematode infection in Xing'an County for scientific evidences to plan effective control and preventive strategies. Methods Survey areas were separately chosen from 5 administrative villages. Modified Kato thick smear method was used to examine fecal eggs in population, and further culturing of the hookworms was carried in subjects with positive findings using test tube filter paper culture method. Pinworm eggs were detected in children aged from 3 to 9 years using cellophane tape anal swab. Small wild fish was captured in the natural water environment, and pressed in between glass slides to undergo detecting metacercaria of Clonorchis sinensis. Results Totally, 1 045 people were investigated. The total infection rate was 4. 40% (46 / 1 045), without mixed infection. The infection rate was 4. 40% for both males and females(21 / 477; 25 / 568), and 0. 57% (6 / 1 045), 2. 68% (28 / 1 045), 0. 48% (5 / 1 045) and 0. 67% (7 / 1 045) respectively, for Clonorchis sinensis, hookworm, whipworm and pinworm. Infection degree was generally mild except for one case with moderate infection of hookworm. Metacercaria of Clonorchis sinensis was detected 12% of the small wild fish(12 / 100). Conclusion Infection of Clonorchis sinensisand soil-borne nematode remains in a lower endemic level in Xing'an County. Hookworm is the main species of infection in local population, which needs intensive control. In addition, certain endemic risk of clonorchiasis still exists in our area.

Key words: Clonorchis sinensis, Soil-transmitted nematode, Epidemiology, Investigation