miracidium


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Related to miracidium: sporocyst, cercariae, Metacercariae, rediae

miracidium

 [mi″rah-sid´e-um] (Gr.)
the free-swimming larva of a trematode parasite which emerges from an egg and penetrates the body of a snail host.

mi·ra·cid·i·um

, pl.

mi·ra·cid·i·a

(mī'ră-sid'ē-ŭm, -ă),
The ciliated first-stage larva of a trematode that emerges from the egg and must penetrate into the tissues of an appropriate intermediate host snail if it is to continue its life cycle; followed by development into a mother sporocyst and by production of a number of offspring of successive larval generations.
See also: sporocyst (1).
[G. meirakidion, boy]

miracidium

/mi·ra·cid·i·um/ (mi″rah-sid´e-um) pl. miraci´dia   the first stage larva of a trematode, which undergoes further development in the body of a snail.

miracidium

(mîr′ə-sĭd′ē-əm, mī′rə-)
n. pl. miracid·ia (-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.

mi′ra·cid′i·al adj.

miracidium

[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.

miracidium

The first-stage larva of a fluke such as Schistosoma species Fasciolopsis or Chlonorchis species. Miracidia are released into water in human excreta and invade particular water snails in which the second-stage larvae (sporocysts) form. These release thousands of cercariae, the form that can pass through the skin to infect humans.

miracidium

(pl. miracidia) the first larval form of a liver- or blood- FLUKE, which develops from the egg as a flat free-swimming, ciliated larva.

Miracidium (plural, miracidia)

The free-swimming larval form in the life cycle of the liver fluke.

miracidium

pl. miracidia [Gr.] the free-swimming, ciliated larva of a trematode parasite which emerges from an egg and penetrates the body of a snail host.
References in periodicals archive ?
mansoni egg contained developed miracidium which was surrounded by eggshell and several vacuolated red blood cells were prominently visible close to it (Fig.
Abbreviation:- A = Apical gland, BV = Blood vessel, G = Penetration gland, GC = Germinal cells, GR = Granuloma, H = Hepatocytes, IUE = Intrauterine eggs, M = Miracidium, NM = Neural mass, RBC = Red blood cells, SI = Sinusoids, W = Worm.
Cytochemical localization of peroxidase activity in the miracidium of Schistosoma mansoni.
Symptoms Chinese liver Eggs include fatigue, fluke contain a anorexia, well- jaundice, and developed gastrointestinal miracidium.
The eggs, which were mechanically ruptured along its long axis, release a highly motile ciliated miracidium which was measuring approximately 127 [micro]m in length (Fig.
These miracidium then find a snail host where the infective tercariae are produced.
59) La miracidium with one pair of flame cells (60) La saclike sporocyst stage ("mother sporocyst") in snail
host follows miracidium (61) La cercaria stage developing in snail follows mother sporocyst
Inside the snail, within several weeks, the miracidium transforms into cercariae.