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Cercaria

Cercaria
The free-swimming trematode larva that emerges from its host snail; it may penetrate the skin of a final host (as in schistosoma of man), encyst on vegetation (as in Fasciola), in or on fish (as in Clonorchis), or penetrate and encyst in various arthropod hosts. Body and tail are greatly varied in form, and specialised function is adapted to the particular life cycle demands of each species.
See: sporocyst, redia.
Origin: g. Kerkos, tail


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