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Related to miracidia: cercariae


(mi?ra-sid'e-um) plural.miracidia [Gr. meirakidion, lad]
The ciliated free-swimming larva of a digenetic fluke. On emerging from an ovum, it penetrates a snail of a particular species and metamorphoses into a sporocyst.
See: fluke
Medical Dictionary, © 2009 Farlex and Partners

Miracidium (plural, miracidia)

The free-swimming larval form in the life cycle of the liver fluke.
Mentioned in: Fluke Infections
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Once within the snail, successful miracidia transform into a sporocyst, a sac-like structure that generates genetically identical cercariae (another small, swimming larvae--see Figure 1), which emerge periodically from infected snails to seek out the next host in the parasite's life cycle.
japonicum miracidia by a stool-hatching method, and no active miracidia were found.
Rearing and infection of the experimental snails: From the progeny of the susceptible and resistant groups, 100 young susceptible (subgroup Ia) and 100 young resistant (subgroup II a) snails were infected by individual exposure to 8-10 vigorously swimming freshly hatched miracidia in palettes, each palette was with six wells, each well accommodated one snail with 2 mL of de-chlorinated tap water.
We found little evidence supporting the hypothesis that the viability of miracidia and metacercariae of F.
In the environment, eggs hatch into miracidia, which asexually reproduce within the terrestrial snail intermediate host after burrowing into its muscular foot.
[37.] Mohamed R (2011) Impact profenophos (pesticide) on infectivity of Biomphalaria alexandrina snails with schistosoma mansoni miracidia and on their physiological parameters.
Effect of ammonium chloride on Bimphalaria alexandrina and its infection with Schistosome mansoni and Echinostoma liei miracidia. J.
The vaccine constructs are SjCTP1-Hsp70 and SjC23-Hsp70; the former was reported to be more successful as it produced a worm burden decrease of 51.2%, liver egg decrease of 61.5%, faecal waste egg reduction of 52.1%, and 52.1% decrease in hatching faecal miracidia. (69)
The effect of environmental factors on the development behaviour and survival of Paramphistomum microbothrium miracidia. Vet.
natalensis was exposed to miracidia from eggs of Fasciola gigantica that were obtained from the slaughterhouse in Cotonou.
In addition, the ovicidal action of PZQ caused inviability of eggs by retraction of miracidia, mostly of mature eggs.
The miracidia in turn infect freshwater snails, where they become sporocysts, which in turn produce many more sporocysts by cell division.