Cercariae


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Related to Cercariae: schistosomiasis, Schistosoma, Metacercariae, rediae

cercaria

 [ser-kar´e-ah] (pl. cerca´riae) (L.)
the final, free-swimming larval stage of a trematode parasite.

cercaria

(ser-ka're-a) plural.cercariae [Gr. kerkos, tail]
A free-swimming stage in the development of a fluke or trematode. Cercariae develop within sporocysts or rediae that parasitize snails or bivalve mollusks. They emerge from the mollusk and either enter their final host directly or encyst in an intermediate host that is ingested by the final host. In the latter case, the encysted tailless form is known as a metacercaria.
See: fluke; trematode

Cercariae

The free-living form of the schistosome worm that has a tail, swims, and has suckers on its head for penetration into a host.
Mentioned in: Schistosomiasis
References in periodicals archive ?
Schistosoma mansoni: human skin ceramides are a chemical cue for host recognition of cercariae.
The effect of Myrrh Commiphora molmol on the infected snails of Schistosma species and their egg masses: Effect on shedding of cercariae and on snail fecundity.
Studies on cercariae from Helisoma trivolvis Say, with descriptions of new species.
Effects of heavy metal pollution on swimming and longevity in cercariae of Cryptocotyle lingua (Digenea: Heterophyidae).
2002), while in vitro study, the crushed seeds showed strong antischistosomal potency against S mansoni different stages (miracidia, cercariae and adult worms) as well as the inhibition in egg laying by the female adult worms was also documented (Mohamed et al.
Analysis of the gene expression profile of Schistosoma mansoni cercariae using the expressed sequence tqg approach.
Within the gills, Ascocotyle cercariae enter the blood stream by penetration of the vascular tissue and encyst to form metacercariae in the fish host.
They then burrow into snails, the first intermediate host, and develop in 3 to 5 months into cercariae, the free-swimming larvae.
Even the cercariae of schistosomes parasitic to birds and animals will often try to penetrate human skin, causing the conditior.
produced low numbers of cercariae compared to the control snails.
However, of the 55 bodies of water where Bulinus snails were found, only 1 contained gastropods with Schistosoma cercariae, and results of a search for blood flukes in 220 small rodents (known for being susceptible to S.