metacercaria


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metacercaria

 [met″ah-ser-kar´e-ah] (pl. metacerca´riae)
The encysted resting or maturing stage of a trematode parasite in the tissues of an intermediate host.

met·a·cer·car·i·a

, pl.

met·a·cer·ca·ri·ae

(met'ă-ser-kar'ē-ă, -ē),
The postcercarial encysted stage in the life history of a fluke, before transfer to the definitive host. Some cercariae attach themselves to grass or other vegetation, form metacercaria, and later are ingested by herbivores, as in Fasciola and similar forms; others encyst in muscles of fish, as in Clonorchis, or in crayfish, as in Paragonimus.
[meta- + G. kerkos, tail]

met·a·cer·car·i·a

, pl. metacercariae (met'ă-sĕr-kar'ē-ă, -ē)
The postcercarial encysted stage in the life history of a fluke, before transfer to the definitive host. Some cercariae attach themselves to vegetation, form metacercariae, and are ingested by herbivores; others encyst in muscles of fish or crayfish.
[meta- + G. kerkos, tail]

metacercaria

a developmental stage in endoparasitic flukes in which the CERCARIA larva loses its tail (to become a metacercaria larva). Except in schistosomes the stage occurs while the organism is in the vertebrate host and it then develops directly into the adult.

Metacercaria (plural, metacercariae)

The encysted stage of a fluke larva that produces infection in human beings.
Mentioned in: Fluke Infections
References in periodicals archive ?
The 30 days old metacercariae were experimentally supplied to ducks and chickens, and a total of 32 adult trematodes were found 3 days after inoculation of 20 metacercarias to each duck.
Durante 1997-1999, se recolectaron en La Sabana, La Ceiba y El Paujil del Distrito Cajigal, Estado Sucre, Venezuela, un total de 94 cangrejos Uca rapax, 36 de ellos estaban parasitados con tres especies de metacercarias de digeneos.
Abundance was calculated as the number of Gymnophallus metacercaria divided by the number of bearded horse mussels sampled.
Later, Stunkard and Uzmann (1959) sampled Mytilus edulis from Connecticut and Massachusetts and observed several life stages of these trematodes, from unencysted metacercaria to gravid adults, in the mussels.
Large numbers of encysted metacercaria of a digenetic trematode species in the genus Echinostoma (Fig.
Finalmente, salen las cercarias bien diferenciadas y se adhieren a las hojas de los berros acuaticos al secretar un fluido gomoso y elastico que al solidificarse forja la metacercaria infectante (Carrada-Bravo, 2003).
physalis has been proposed because the metacercaria of this parasite has been described in specimens captured in waters of Argentina and Uruguay (Timi et al., 1999; Horne et al., 2011).
Development from metacercaria to adult of a new species of Maritrema (Digenea: Microphallidae) parasitic in Kelp Gull, Larus dominicanus, from Patagonian coast, Argentina.
Rashed (2008) reported the recovery of a new parasite metacercaria of the Brachylaima from the kindney of infected land snail, Monarcha obstucta in Egypt.
Douellou and Erlwanger [28] recovered Clinostomum metacercaria in nonsiluroid fishes in Lake Kariba.