On the immunity of snails infested with the sporocysts of the Strigcid, Cotylurus flabelliformis, to the penetration of its cercaria.
作者： Gerald F. Winfield
DOI: 10.2307/3271614
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摘要: Among digenetic trematodes a few cases are known in which single species of snail may serve both as first and second intermediate hosts. An example this is found the life cycle strigeid, Cotylurus flabelliformis. Certain observations experiments made during summer I93I at University Michigan Biological Station indicated that when an individual harbors sporocyst stage it highly immune to penetration cercaria.
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