本文作者对新形成的发育中和成熟的尾蚴、一周龄的童虫以及成虫的表皮的大分子碳水化合物和多电解质类的超微结构的定位作了检查。从螺蛳逸出的尾蚴和在胞蚴内成熟的尾蚴的表面覆盖一层丝状的被膜,用细胞化学试剂可显示连位甘醇类反应,但是被膜和质膜的表层在酸硷度低时并不能结合胶状铁的阳离子。钻进哺乳类皮肤时,尾蚴脱掉它表层的 The authors examined the ultrastructural localization of macromolecular carbohydrates and polyelectrolytes in the newly formed developing and mature cercariae, one-week-old schistosomiasis, and adult epidermis. The cercariae escaped from the snails and the surface of the mature cercariae in the cercariae were covered with a filamentous envelope. The cytochemistry showed a vicinal glycol reaction, but the surface layers of the envelope and the plasma membrane, when pH was low It does not combine with colloidal iron cations. Drilling into mammalian skin, cercariae take off its surface