日本血吸虫毛蚴对不同密度和距离湖北钉螺易感性的初步实验观察  

Susceptibility of Schistosoma japonicum miracidium to Oncomelania hupensis snails at different densities and distances:a primilinary experimental observation

作　　者：汪伟[1,2] 李洪军[1,2] 李幼子[1,2] 邢云天[1,2] 曲国立[1,2] 魏剑英[1,2] 戴建荣[1,2] 梁幼生[1,2] 

机构地区：[1]江苏省血吸虫病防治研究所,江苏无锡214064 [2]卫生部寄生虫病预防与控制技术重点实验室,江苏无锡214064

出　　处：《海洋科学》2011年第10期64-68,共5页Marine Sciences

基　　金：国家自然科学基金(81071379);国家科技支撑计划(2009BAI78B06);江苏省卫生厅项目(200701;200901)

摘　　要：为探讨日本血吸虫(Schistosoma japonicum)毛蚴对不同密度、不同距离湖北钉螺(Oncomelania hupensis)易感性,在现场环境下,采用20 000条新鲜孵化出的日本血吸虫毛蚴分别感染1、2、3、5 m处的湖北钉螺,每处钉螺分为5、10、50、100只/袋4个密度组,感染4 h后带回实验室饲养,8周后解剖观察钉螺感染情况。结果发现,距离1、2、3、5 m,密度5、10、50、100只/袋4个组钉螺感染率分别为7.06%、4.35%、2.47%和1.23%;4.55%、4.44%、4.11%和2.27%;2.62%、1.58%、1.29%和1.1%;2.36%、4.04%、2.73%和1.5%。研究表明,钉螺感染概率与距毛蚴投放的距离成反比;但是,未得出钉螺感染率与钉螺密度之间的线性关系。To investigate the susceptibility of Oncomelania snails at different densities and to miracidium of Schistosomajaponicum, snails at 1, 2, 3 and 5 m, each with densities of 5, 10, 50 and 100 per package were infected with 20 000 freshly hatched miracidia in the field, and transferred to laboratory 4 h post-infection. All snails were dissected for infection eight weeks later. At sites of 1, 2, 3 and 5 m, the infection rates of snails were 7.06%, 4.35%, 2.47% and 1.23%, 4.55%, 4.44%, 4.11% and 2.27%, 2.62%, 1.58%, 1.29% and 1.1%, 2.36%, 4.04%, 2.73% and 1.5%, respectively for snail densities of 5, 10, 50 and 100 per package. It is indicated that the infection rates of snails are inversely proportional to the distances from the miracidium-disposal sites, but no linear relation between snail infection rate and snail density.

关 键 词：日本血吸虫(Schistosoma japonicum) 湖北钉螺(Oncomelania hupensis) 毛蚴 密度 距离 

分 类 号：R383.24[医药卫生—医学寄生虫学]