miracidium

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Related to Miracidia: cercariae

mi·ra·cid·i·um

 (mîr′ə-sĭd′ē-əm, mī′rə-)
n. pl. mi·ra·cid·i·a (-ē-ə)
A ciliated larva of a digenetic trematode, which hatches from the egg and enters the first intermediate host, where it develops into a sporocyst or a redia.

[German, from Greek *meirakidion (attested in Latin as mīracidion, one in early adolescence), diminutive of meirax, young girl, young person, lad.]

mi′ra·cid′i·al adj.

miracidium

(ˌmaɪrəˈsɪdɪəm)
n, pl -ia (-ɪə)
(Animals) the flat ciliated larva of flukes that hatches from the egg and gives rise asexually to other larval forms
[C20: New Latin, via Late Latin miracidion, from Greek meirax boy, girl]
ˌmiraˈcidial adj
References in periodicals archive ?
Also, the time delay between infection of the snail by a miracidia and the development of the sporocyst to a point where cercaria begin to be excreted is temperature dependent and represented by the delay time, [[tau].
Serial sectioning showed that the eggs contained miracidia and had the overall appearance of S.
Transmission potential undoubtedly increases when snail intermediate hosts are available and ambient water temperatures are conducive for survival and motility of both miracidia and cercariae; however, age-related host responses, seasonal shifts in host foraging habits (Kelley & Horner 2008), and variable times of parasitic development and migration may obscure some seasonal parasite-host relationships.
The miracidia invade soft tissue of snails where they reproduce asexually.
The miracidia then penetrate, and further develop in, snails of the family Lymnaeidae.
embryonated eggs pass in the feces of the definitive host and miracidia hatch and penetrate tissues of a snail (first intermediate host).
The eggs then hatch and release miracidia, which penetrate and develop in an appropriate species of an intermediate snail host.
macroderoidids, ochetosomatids and telorchids; or by direct penetration of free-swimming miracidia hatched from eggs deposited in the bottom debris, as in Allassostomoides sp.