[Analysis of surveillance results of schistosomiasis in Hexi reservoir area from 2012 to 2015].

Objective: To understand the changes of schistosomiasis epidemic situation, so as to provide the evidence for formulating schistosomiasis control strategy in the Hexi reservoir area.

Methods: From 2012 to 2015, Xinyuan Village, Meishan Town in the north entrance of Hexi reservoir was selected as a monitoring site. According to the requirements of the monitoring program of schistosomiasis surveillance in Zhejiang Province, the infection was investigated by using the serological screening (IHA), and the basic situation of the surveillance site was also investigated.

Results: From 2012 to 2015, 167 environments (21.68 hm) were surveyed, and 2 slices (0.1 hm) were found with snails. The detection rate of frames with snails was 0.12%, and the living snail density was 0.0192 snails per 0.1 m. Totally 374 snails were dissected and no schistosome infected snails were found. A total of 970 local residents and 8 748 mobile people were investigated with the serological tests, and no schistosome infected people were found. In addition, 3 085 cattle were investigated and no infected ones were found.

Conclusions: The schistosomiasis epidemic situation is stable in the Hexi reservoir area, but we still should strengthen the monitoring of imported source of infection and snail status, and increase the efforts of environmental transformation.