尾蚴钻入皮肤,转变为童虫是宿主与寄生虫相互关系的第一个作用阶段。血吸虫尾蚴钻入正常宿主的皮肤内很少引起明显的反应,而非寄生人体的血吸虫如禽类血吸虫钻入人体后则引起皮炎。小鼠感染大量尾蚴,9～14周后进行攻击感染,皮肤的免疫应答表现为早期水肿续之以多形核及单核细胞浸润;而未经感染的对照组,虽有水肿但很少有细胞浸润。上述细胞反应也可因注射尾蚴浸出液而诱发。将尾蚴抗原制品(CAP)加福氏 Cercariae into the skin, into a squirrel is the host and parasite relationship between the first phase of action. Schistosome cercariae into the normal host skin rarely cause a significant reaction, rather than parasitic human schistosomula, such as poultry, schistosomiasis into the human body caused by dermatitis. Mice infected with a large number of cercariae, 9 to 14 weeks after the challenge infection, the skin’s immune response showed early edema followed by polymorphonuclear and monocyte infiltration; while the control group without infection, although there are few edema Cell infiltration. The cellular response may also be induced by injection of cercariae leachate. The cercaria antigens products (CAP) plus Forsythia