cercaria

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cercaria

 [ser-kar´e-ah] (pl. cerca´riae) (L.)
the final, free-swimming larval stage of a trematode parasite.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

cer·car·i·a

, pl.

cer·car·i·ae

(ser-kā'rē-ă, -rē-ē),
The free-swimming trematode larva that emerges from its host snail; it may penetrate the skin of a final host (as in Schistosoma of humans), encyst on vegetation (as in Fasciola), in or on fish (as in Clonorchis), or penetrate and encyst in various arthropod hosts. Body and tail are greatly varied in form, and specialized function is adapted to the particular life cycle demands of each species.
See also: sporocyst (1), redia.
[G. kerkos, tail]
Farlex Partner Medical Dictionary © Farlex 2012

cercaria

(sər-kâr′ē-ə)
n. pl. cercar·iae (-ē-ē′) or cercar·ias
A larva of a trematode, which develops from a sporocyst or a redia.

cer·car′i·al adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

cer·car·i·a

, pl. cercariae (sĕr-kar'ē-ă, -ē)
The free-swimming trematode larva that emerges from its host snail; it may penetrate the skin of a final host, encyst on vegetation, or in or on fish, or penetrate and encyst in various arthropod hosts. Body and tail are greatly varied in form, and specialized functions are adapted to the particular life-cycle demands of each species.
See also: sporocyst (1)
[G. kerkos, tail]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

cercaria

The tailed, swimming larva of a trematode worm, such as a SCHISTOSOME.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

cercaria

the last larval stage of the liver FLUKE. It lives in the freshwater snail Limnaea, produces a cyst round itself and develops into the adult fluke after ingestion by a sheep or another primary host.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

Cercaria (plural, cercariae)

An intermediate-stage of the fluke larva, released into water by infected snails.
Mentioned in: Fluke Infections
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
y por lo tanto ser mas eficiente en el numero de cercarias producidas, aumentando la posibilidad de infeccion [10]; o por diferencias raciales [8], ya que los animales muestreados a 2.000 m.s.n.m.
En el caso de Microphallidae, es posible que exista cierta especificidad de las cercarias por sus hospedadores intermediarios, dada la relacion indirecta entre abundancia de las especies de crustaceos con la carga parasitaria de estas metacercarias.
Semelhantemente aos trematodeos das familias Opisthorchiidae e Heterophyidae, suas cercarias se desenvolvem e abandonam caramujos aquaticos, encistando-se em metacercarias nos tecidos de outros moluscos, anfibios ou peixes de agua doce.
Scinax nasicus, intervem como segundo hospedador intermediario, infectando-se pela penetracao direta de cercarias. O numero de ovulos maduros por femea (complemento ovarico) oscilou entre 413-3922, enquanto que o diametro medio dos ovulos foi de 0,76 [+ ou -] 0,17mm.
Munoz (2001) reporta la muerte de alevines de tilapias ocasionada por trematodos digeneos, encontrando dos quistes de metacercarias, morfologicamente diferentes, en branquias e higado, a los que llamo morfotipo 1 y 2; sin embargo, no logro identificar las especies de parasitos y los moluscos que portaban las cercarias.