关键词: 血吸虫病, 钉螺, 监测

Abstract: Objective To analyze the environment of snail distribution and the reason of snail existence in Zhejiang province during 2013-2015, to provide scientific basis for effective control of snails. Methods The data of snail surveillance during 2013-2015 were collected and analyzed. And then a questionnaire was sent, to collect data and performed related statistical analysis. Results Small number of snails were found every year in an area of 130.88 hm2. There were 3 691 snail spots but no infected snails were found. The distribution of environment mainly were ditch, paddy, nursery and aquaculture area. The proportion of nursery and aquaculture area of snail increased year by year. Respectively, accounted for 21.40% and 19.68%, 19.14% and 16.15%, 21.03% and 16.28% of the actual snail area in 2013 to 2015. By analysis by SPSS 19.0 software, during 2013-2015, four actual snail areas of compression rate ranged ditch > paddy > nursery > aquaculture area, the difference was statistically significant(χ²=58 028.360, 53 764.850, and 25 461.490, P<0.05). The nursery and the aquaculture area environment of compression rate was low. Conclusion There are still certain areas of snail in Zhejiang province, effect of nursery and aquaculture area of reproduction and diffusion of snail was gradually increased. Nurseries and aquaculture areas with snail breeding and proliferation need to be monitored, local feasible measures should be considered to reduce snail areas.

Key words: Schistosomiasis, Snail, Surveillance