在水中，淡水螺中释放出的尾蚴侵入人体皮肤，造成感染。
Larval forms of the parasites, which are released by freshwater snails, penetrate the skin of people in the water.
目的：寻找照射致弱尾蚴中起免疫保护作用的抗原分子，为血吸虫病疫苗研究提供新的候选抗原。
Objective: To find out the major antigenic molecules of radiation attenuated cercariae, and provide some useful candidate antigens for developing schistosomiasis vaccine.
每一个囊尾蚴是由一个囊壁和陷入囊腔中的单独一个头节所组成的。
Each cysticercus consists of a cyst wall and a single scolex invaginated into the lumen.
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