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Chernin和Dunavan(1962)证实约40％的小白鼠源曼氏血吸虫毛蚴能成功地使易感的扁卷螺Biomphataria glabrata获得感染。Shibb(1968)报道用人体源曼氏血吸虫毛蚴作实验感染也得到相似的结果。感染失败的原因或许由于毛蚴没能钻入或许钻入后即死亡。为了探究第一个可能性,作者在不同的实验条件下了解到未能钻入易感性螺的毛蚴的比例。全部实验均在25～27℃下进行,采用感染波多黎各株曼氏血吸虫的小白鼠的肝脏和大便经孵化30～60分钟的毛蚴。在5毫升的烧杯中盛水2毫升,放入一定数量的毛蚴和一只室内饲养的扁卷螺(B.gtabrata),经一定时间后,取出螺蛳,加一滴1％碘酒,计数毛蚴。结果证实,不同的毛蚴来源并无
Chernin and Dunavan (1962) confirmed that about 40% of mice originating from Schistosoma mansoni could successfully get the susceptible strain of Biomphataria glabrata. Shibb (1968) reported similar results with an experimental human infection of Schistosoma mansoni. The reason for the failure of the infection may have died because miracidia did not penetrate or perhaps drilled. To explore the first possibility, the authors learned under different experimental conditions the proportion of miracidia that did not penetrate susceptible spirochetes. All experiments were carried out at 25 ~ 27 ℃, the use of infected mice with Schistosoma mansoni mice liver and stool after incubation for 30 to 60 minutes of miracidia. In a 5 ml beaker, add 2 ml of water, place a quantity of miracidia and an indoor b.gtabrata. After a certain period of time, remove the snails, add a drop of 1% iodine and count the miracidia. The results confirmed that there is no different source of miracidia