作者描述了S. intercalatum、S. leiper、S. margrebowiei 3种非洲血吸虫在室外(与野外环境相似)逸放尾蚴的模式,用埃及血吸虫作对照。采用实验室饲养约6周年龄的螺蛳,每只螺蛳接种5只新鲜毛蚴。各种血吸虫分别每隔2小时收集一次尾蚴。实验观察在两个季节进行,1974年10～11月连续观察120小时,1975年2月又观察2次,每次120小 The authors describe the patterns of escaped cercariae S. intercalatum, S. leiper, S. margrebowiei in vitro (similar to the wild environment) of three African schistosomiasis controls, using S. schistosomiasis as a control. Five weeks-old snails were fed in the laboratory and five fresh miracles were inoculated per snail. A variety of schistosomes were collected every 2 hours cercariae. The experimental observation was conducted in two seasons, with continuous observation of 120 hours from October to November 1974 and twice in February 1975, each time being 120 hours