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血吸虫感染可产生一定的免疫力已属无疑。其原理和其他病原感染基本相同,惟其表现则有差异,特别是缺乏快速而坚强的免疫力。除少数有自愈现象的动物外,其他宿主包括人体往往需经多次反复感染,才能加强其对抗血吸虫侵袭的机体反应。换句话说,宿主对血吸虫的免疫力是由反复斗争而产生,由反复斗争而发展的。动物接种尾蚴的实验观察和人体急、慢性血吸虫病的临床表现已充分证明了这一点。但是,以往不论抗体或细胞的被动转移都没有成功地获得保护作用,因此免疫机理不明。最近在循环抗体
Schistosoma infection can produce some immunity is no doubt. The principle and other pathogenic infections are basically the same, but its performance is different, especially the lack of rapid and strong immunity. With the exception of a few animals that have self-healing phenomena, other hosts, including the human body, often require multiple repeated infections to enhance their response to the attack of the schistosome. In other words, the immunity of the host to schistosomes is generated by repeated struggles and developed by repeated struggles. Animal inoculated cercariae in the experimental observation and human acute and chronic schistosomiasis clinical manifestations have fully proved this point. However, in the past, the passive immunization of antibodies or cells did not succeed in obtaining the protective effect, so the immune mechanism was unknown. Recently circulating antibodies