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作者以南非的羊血吸虫、埃及血吸虫和曼氏血吸虫的尾蚴进行了下列实验: 1.不同盐浓度对尾蚴寿命的影响:自螺体逸出的尾蚴,每次约10条置于含有不同盐浓度的1ml溶液中,每两小时观察1次,以解剖针轻触或振动容器见尾蚴不再活动时,视为死亡。结果盐浓度在≥17.5‰时,8分钟后尾蚴沉入管底,11分钟时全部死亡;浓度为27.0‰和35.0‰时分别于5分钟和4分钟死亡;浓度5.25‰与清水之间无显著差
The authors carried out the following experiments with Schistosoma japonicum, Schistosoma haematobium and Schistosoma mansoni cercariae: 1. Effects of different salt concentrations on the cercariae’s life span: About 10 cercariae escaped from the spirochete were placed in a bath containing different salt concentrations 1ml solution, observed once every two hours, with a dissection needle touch or vibration container see cercariae is no longer active, as death. Results When the salt concentration was more than 17.5 ‰, the cercaria landed at the bottom of the tube after 8 minutes and all died at 11 minutes. At the concentrations of 27.0 ‰ and 35.0 ‰, the cercariae died at 5 and 4 minutes respectively. No significant difference was found between 5.25 ‰ and water difference