Surveillance of schistosomiasis in Three Gorges Reservoir areas from 2002 to 2007 / 中国血吸虫病防治杂志

ABSTRACT

Objective To explore the potential risk factors of schistosomiasis transmission so as to provide evidence for setting up the surveillance scheme of schistosomiasis prevention and control. Methods The schistosome infection of local inhabitants, mobile population and stock from endemic areas were investigated from 2002 to 2007 by using IHA or ELISA technique. The historical endemic reports of Chongqing City and the schistosomiasis cases, and the plants imported from schistosomiasis endemic areas and Oncomelania snails were investigated. The behavior of local inhabitants was also investigated. Results The investigated people included 5 112 local inhabitants, 1 455 mobile people from schistosomiasis endemic areas and 1 744 residents returned from the endemic areas. The sero-positive rates of them were 0.57%, 1.44% and 0.86%, respectively. Eighteen cases of imported schistosomiasis were found. There were many plants and stock imported from the schistosomiasis endemic areas. No imported snail was found. The farming of local inhabitants depended on the cattle chiefly. The rate of the harmless lavatories was 14.88%. The local residents had the habit of water contact. Conclusion There are potential risk factors for schistosomiasis transmission in the Three Gorges Reservoir areas. The local residents have potential risk behavior of getting infection of Schistosoma japonicum. The surveillance should be emphasized on the mobile population, imported plants and stock from endemic areas.