枞阳县江洲滩地区血吸虫病17年疫情纵向分析

LONGITUDINALANALYSISONSCHISTOSOMIASISSITUATIONINBEACHAREAOF THEYANGTZERIVEROFZONGYANGCOUNTY,ANHUIPROVINCEFOR17 YEARS

对枞阳县近１７ 年来有关血吸虫病疫情资料进行了分析，结果表明：滩地有螺面积逐年增加，潜在疫区不断扩大；滩地活螺密度高低不一，但总体趋势变化不大；滩地阳性螺密度年间差异较大，出现１９８３ 、１９８９～１９９２ 、１９９８ 年３ 次高峰；人群感染率及急血发病人数均与滩地阳性螺密度呈正相关，人群感染率还与滩地活螺密度呈正相关。提示在目前尚不能控制人群接触疫水的情况下，控制滩地活螺密度尤其是阳性螺密度对控制人群感染具有重要意义。

Schistosomiasissituation based on 17 years○data in beach area ofthe Yangtze River of Zongyang County hasbeen analysed .Theresultsshowedthatthesnailhabitatareaincreased year by yearindicating there were unceasingextension oflatentendemic areas but no remarkablechange wasfoundin density ofliving snail. The density ofin fected snail wasremarkablly differentin 17 years○period and three peaks were revealed in 1983 ,1989 ～1992 and 1998 .Correlation analysisindicated thatthere were positive relationship between human infection rate,number of acute case andinfected snaildensityas wellas humaninfection rate andliving snaildensityin beach area.According to theresults,theauthorssuggestedthattocontrolhumaninfectionsit wasimportantto controllivingsnailespecial lytheinfected snaildensityin beach area.