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用波长2,537的紫外线照射刚逸出的尾蚴。灯与尾蚴悬液间的距离为16.5厘米。因紫外线在液体中的穿透性不好,故尾蚴悬液不应超过10毫升。重复作了四项实验: 1.研究紫外线照射对曼氏和埃及血吸虫尾蚴的活力和行为的影响。在碟中盛放5毫升含80～100条尾蚴的悬液,经紫外线照射5～60秒后进行观察。以未照射的正常尾蚴作为对照。 2.比较照射(5～20秒)的尾蚴和未照射的正常尾蚴在穿入宿主皮肤时的死亡情况。每只小白鼠接种1,000～2,000条尾蚴,15分钟后从皮肤内收集童虫。 3.比较照射(10秒)的尾蚴与未照射的尾蚴在感染动物中移行到肺的情况。每组20
With a wavelength of 2,537 ultraviolet radiation just escape cercariae. The distance between the lamp and the cercaria suspension was 16.5 cm. Due to UV penetration in the liquid is not good, so cercariae suspension should not exceed 10 ml. Four experiments were repeated: 1. To investigate the effect of ultraviolet radiation on the viability and behavior of Schistosoma mansoni and cercariae of Schistosoma mansoni. In the dish in full bloom 5 ml containing 80 to 100 cercariae suspension by UV irradiation for 5 to 60 seconds after the observation. Non-irradiated normal cercariae as a control. 2. Comparison of the death of cercariae and non-irradiated normal cercariae irradiated on the skin of the host (5-20 seconds). Mice were challenged with 1,000-2,000 cercariae per mouse, and after 15 minutes they were collected from the skin. 3. Comparative irradiation (10 seconds) of cercariae and non-irradiated cercariae in infected animals migrate to the lungs. 20 per group