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What (who) is Cercaria - definition

LARVAL FORM OF TREMATODES

Cercariae; Cercarium; Cercaria (trematode); Sercaria

Cercaria

·noun The larval form of a trematode worm having the shape of a tadpole, with its body terminated by a tail-like appendage.

Cercaria

A cercaria (plural cercariae) is the larval form of the trematode class of parasites. It develops within the germinal cells of the sporocyst or redia.

https://en.wikipedia.org/wiki/Cercaria

cercaria

[s?:'k?:r??]

¦ noun (plural cercariae -?i:) Zoology a free-swimming larval stage in which a parasitic fluke passes from an intermediate host (typically a snail) to another host.

Origin

C19: mod. L., formed irregularly from Gk kerkos 'tail'.

Wikipedia

Cercaria

A cercaria (plural cercariae) is the larval form of the trematode class of parasites. It develops within the germinal cells of the sporocyst or redia. A cercaria has a tapering head with large penetration glands. It may or may not have a long swimming "tail", depending on the species. The motile cercaria finds and settles in a host where it will become either an adult, or a mesocercaria, or a metacercaria, according to species.

The term Cercaria is also used as a genus name in descriptions of species when only the larval form is known.

Rotifers (Rotaria rotatoria) produce a chemical, Schistosome Paralysis Factor, suppressing cercaria swimming and reducing infections.

https://en.wikipedia.org/wiki/Cercaria