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]

metacercaria

/meta·cer·ca·ria/ (-ser-kar´e-ah) pl. metacerca´riae   the encysted resting or maturing stage of a trematode parasite in the tissues of an intermediate host or on vegetation.

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

metacercaria

pl. metacercariae; the encysted resting or maturing stage of a trematode parasite in the tissues of a second intermediate host or on vegetation.
References in periodicals archive ?
According to Niewiadomska (2002), Neodiplostomum type metacercaria cannot be assigned to adult genera with certainty without knowing their complete life cycle; metacercariae are then referred to as types.
The total number of infected juvenile fish was analyzed by using logistic regression with the same predictor as for metacercaria counts and adjusting for clustering within ponds.
gouldii: two collected from SCR and one from NSS, the two locations with the highest mean metacercaria counts; the three individuals infested with sporocysts each had metacercarial counts greater than 100.
villosum (body cavity), the metacestode Nybelinia surmenicola (stomach wall), the digenean metacercaria Otodistomum sp.
BC 2 Metacercaria 1* M 36 Metacercaria 2* M 2 Acanthocephala Neoechinorhynchus sp.
Tagelusplebeius was found housing two ciliate species without apparent host reaction and acting as first intermediate host for two digenetic trematode species of the families Fellodistomidae and Gymnophallidae, by hosting sporocysts (mainly in gonad and digestive gland that results in the replacement of host tissues) and as second intermediate host by housing a gymnophallid metacercaria.
37, range = 0-596) was the neascus metacercaria of the trematode Posthodiplostomum minimum.
KEY WORDS: gymnophallus, histopathology, Modiolus barbatus, sporocyst, metacercaria