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 ?
Global warming and temperature mediated-increases in cercarial emergence in trematode parasites.
12: cercarial body showing tegument covered with large spines distributed in 9-10 transverse rows between anterior organ and ventral sucker; 13: cercarial body showing the penetration gland-cells.
Cercarial dermatitis, or swimmer's (duck hunter's) itch, has occurred in seasonal outbreaks in swimmers in freshwater lakes and rivers whose resident or migratory waterfowl are infected with avian schistosomes (Figure 3).
The influence of temperature on the succession of redial and cercarial generations of Fasciola gigantic in a snail host.
Schistosoma mansoni blockage of cercarial skin penetration by chemical agents: I.
Schistosomes in the southwest United States and their potential for causing cercarial dermatitis or 'swimmers itch.' Journal of Heminthology, 83(2), 191-198.
Since transmission is a major determinant of parasite fitness, perhaps other factors, such as local host population dynamics, fish feeding habits, strategies in cercarial release from first intermediate hosts and also the type of fresh water environments (lotic or lentic environment), would be primarily influencing success in parasite transmission.
While discrete receptor cells have yet to be characterized, the presence of photo/gravity/pressure receptors in the eye-spots or elsewhere may influence behavioral responses that affect cercarial swimming, such as the ascent of Euhaplorchis cercariae upon emergence from benthic snails toward their second intermediate host fish in the water column (Cable, 1972; Combes et al.., 1994).
A 0- to 3-day time window of interest for skin rash was based on prior studies of outbreaks of cercarial dermatitis, which generally occurs within the first 2 days of water recreation [Centers for Disease Control and Prevention (CDC) 1992; Hoeffler 1977; Mulvihill and Burnett 1990].
The shaved skin was moistened with aquarium water and cercarial suspension (1 ml/animal) was placed through plastic ring.
* Cercarial dermatitis, also known as swimmer's itch, is a maculopapular inflammation characterized by pain, prickling, and pruritus.