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Related to miracidia: cercariae


[mir′əsid′ē·əm] pl. miracidia
Etymology: Gk, meirakidion, youthfulness
the ciliated larva of a parasitic trematode that hatches from an egg and can survive only by penetrating and further developing within a host snail into a maternal sporocyte that produces more larvae.


(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

Miracidium (plural, miracidia)

The free-swimming larval form in the life cycle of the liver fluke.
Mentioned in: Fluke Infections
References in periodicals archive ?
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.
Mohamed R (2011) Impact profenophos (pesticide) on infectivity of Biomphalaria alexandrina snails with schistosoma mansoni miracidia and on their physiological parameters.
Fasciola hepatica: the infection rate and the development of redial generations in Lymnaea truncatula exposed to miracidia after experimental desiccation and activation in water.
McKeown and Irwin (1997) suggested that the first period of accumulation was occurred by a cercariae which had been released by snails survived through the winter, whereas the second period of accumulation resulted from cercariae shed by snails which had hatched in the spring and had been infected by diplostome miracidia in the summer.
Responses of miracidia of Schistosomatium douthitti (Cort 1914) to monochromatic light.
Miracidia of various morphological features were prominent in both parasite infections.
Excreted eggs hatch in freshwater, liberating miracidia that enter snails.
alternata can function as the primary intermediate host for the miracidia (Jenson 1972).
Miracidia are motile and remain infective for 8-12 hours, locating the intermediate snail host by chemotactic stimuli.