Investigation of prevalence of clonorchiasis in Sanjiang plain area

Objective To understand the prevalence of clonorchiasis in Sanjiang plain area of Heilongjiang province,and provide evidence for the prevention and treatment of clonorchiasis. Methods A survey was conducted in 26 villages in 9 counties (cities),and the modified Kato thickness smear method was used to detect the eggs of Clonorchis sinensis. Results A total of 6 574 people were surveyed and 575 of them were found to be infected with Clonorchis sinensis,the infection rate was 8.75%. Most infections were mild. Clonorchis sinensis infection status differed in people with different regional,gender,age, occupation and education level. In general,the incidence of infection in Sanjiang intersection was higher than that in other areas,males were higher than women,mainly infected by young adults,higher education level in junior middle school than other educational backgrounds,and the characteristics of fishermen higher than other occupational groups. Conclusion The infection rate of Clonorchis sinensis is high in the intersection of three rivers in Sanjiang plain area and young men are key population in the prevention and control of clonorchiasis.