McCarthy A M, Kanev I
Division of Biosphere Sciences, University of London, U.K.
Parasitology. 1990 Jun;100 Pt 3:423-8. doi: 10.1017/s0031182000078719.
Infectivity of Pseudechinoparyphium echinatum cercariae to 11 species of gastropod was examined experimentally. Broad specificity and differential host-parasite compatibility were exhibited. Nine gastropod species functioned as second intermediate hosts. Planorbarius corneus, Physa fontinalis, Lymnaea peregra and Biomphalaria alexandrina showed high levels of compatibility with the parasite. In single-species exposures over 90% of cercariae encysted in each of these hosts. Low compatibility with the first intermediate host species Lymnaea stagnalis may be a mechanism preventing super-infection of emitting snails. Cercariae did not infect the prosobranchs Bithynia tentaculata and Viviparus viviparus. Experimental infection of a host community comprised of 8 European gastropod species revealed an order of host utilization similar to that shown in single-species exposures. However, cercarial transmission success in P. fontinalis and L. peregra (compared to that in P. corneus) was significantly reduced. This may have been due to the marked preference of cercariae for P. corneus compared to the other two highly suitable hosts for whom cercariae showed equal preference.
通过实验研究了棘刺伪艾氏吸虫尾蚴对11种腹足纲动物的感染性。结果显示出广泛的特异性和宿主 - 寄生虫的差异兼容性。9种腹足纲动物可作为第二中间宿主。角田螺、泉膀胱螺、截口土蜗和亚历山大双脐螺与该寄生虫表现出高度兼容性。在单物种暴露实验中，超过90%的尾蚴在这些宿主中形成包囊。与第一中间宿主物种静水椎实螺的低兼容性可能是一种防止排放性蜗牛重复感染的机制。尾蚴不会感染前鳃亚纲的有触角豆螺和梨形环棱螺。对由8种欧洲腹足纲动物组成的宿主群落进行的实验感染显示出与单物种暴露中相似的宿主利用顺序。然而，泉膀胱螺和截口土蜗中的尾蚴传播成功率（与角田螺相比）显著降低。这可能是由于与其他两种尾蚴同等偏好的高度适宜宿主相比，尾蚴对角田螺有明显偏好。
