钉螺在苏南血吸虫病非流行区的生存繁殖及易感性实验  

Experiment of Oncomelania hupensis snail reproduction and susceptibility in schistosomiasis non-endemic area in Southern Jiangsu

作　　者：王学东[1] 陈新峰[1] 吴锋[2] 袁飞[1] 朱振球[3] 胡一河 刘永元[4] 

机构地区：[1]江苏省张家港市疾病预防控制中心,张家港225500 [2]江苏省血吸虫病防治研究所 [3]江苏省苏州市人民政府血吸虫病地方病防治工作领导小组办公室 [4]江苏省苏州市疾病预防控制中心

出　　处：《中国血吸虫病防治杂志》2010年第2期182-184,共3页Chinese Journal of Schistosomiasis Control

基　　金：苏州市科技发展计划项目(SS0705);江苏省卫生厅血地寄防应用性科研项目(X2007010);张家港市科技发展计划项目(ZKS0806)

摘　　要：目的观察钉螺在长江河口段苏南血吸虫病非流行区的生存、繁殖及感染情况。方法用长江河口段苏南血吸虫病非流行区的泥土及江水,将采自长江上游江滩的当年新螺置实验室内饲养,观察其生存、繁殖及感染情况,并用血吸虫病流行区泥土作对照。结果6个月和12个月后的钉螺存活率,实验组和对照组差异均无统计学意义(χ2=0.7278,0.4161,P均>0.05);春季每只雌螺的平均产卵数为67.69个,95%可信区间为24.0260～110.0974;螺卵平均孵化率83.60%,各组间差异无统计学意义(χ2=9.1318,P>0.05);子代成螺经人工感染60d后,感染率为1.40%(5/356)。结论长江上游江滩钉螺在长江河口段苏南血吸虫病非流行区实验室能够正常生存和繁殖,其子代钉螺能够在实验室感染血吸虫。Objective To observe the survival and reproduction of Oncomelania hupensis snails and their susceptibility to schistosome in schistosomiasis non-endemic area of the Yangtze River estuary in Southern Jiangsu.Methods The soil and water from the Yangtze River estuary of Southern Jiangsu were used for the experiment.The snails reproduced in the same year were collected from the upper reaches of the Yangtze River and raised in the laboratory.The snail survival and reproduction rates and schistosome infection of the snails were observed.The soil collected from schistosomiasis endemic area was used in the control group.Results There was no significant difference between the experimental and control groups for the snail survival rates both in 6 and 12 months （χ^2=0.727 8,P0.05 and χ^2=0.416 1,P0.05）.Each female snail reproduced 67.69 eggs in average （95% CI：24.026 0-110.097 4）.The average hatchability rate of snail eggs was 83.60%,and there was no significant difference between the 2 groups （χ2=9.131 8,P0.05）.The schistosome infection rate of the second generation snails was 1.40% （5/356） 60 days after the infection in the laboratory.Conclusions The snails collected from the upper reaches of the Yangtze River marshland can survival and reproduce in the soil and water from schistosomiasis non-endemic area of the Yangtze River estuary of Southern Jiangsu,and the second generation of the snails can be infected with schistosome in the laboratory.

关 键 词：钉螺 生存繁殖 易感性 

分 类 号：R383.24[医药卫生—医学寄生虫学]