淡水螺可作为许多寄生吸虫的中间宿主,有些寄生虫如血吸虫对人类有重要影响。由于寄生虫只能在一定的中间宿主体内发育,因此它们之间具高度特异性。即使在适合的宿主内,吸虫与螺之间的相容性也存在差异。寄生虫与螺间的相容性主要由控制螺抗性有关的控制寄生虫感染的基因决定。虽然寄生虫可以钻入螺,但产生尾蚴过程中要在宿主体内的存活及成熟,尾蚴逸出的峰值均 Freshwater snails can serve as an intermediate host for many parasitic flies, and some parasites such as schistosomiasis have a significant impact on humans. Since parasites can only develop in certain intermediate hosts, they are highly specific. There is a difference in compatibility between Trematodes and snails, even in suitable hosts. The compatibility between parasites and snails is largely determined by the genes controlling the resistance of the control parasites that control infection. Although the parasite can drill into the snail, the survival and maturation of the cercariae in the host body during the cercariae production are both peak in the cercariae