cercaria

(redirected from cercarias)
Also found in: Dictionary, Thesaurus, Encyclopedia.

cercaria

 [ser-kar´e-ah] (pl. cerca´riae) (L.)
the final, free-swimming larval stage of a trematode parasite.

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]

cercaria

/cer·ca·ria/ (ser-kar´e-ah) pl. cerca´riae   the final, free-swimming larval stage of a trematode parasite.cercar´ial

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.

cercaria

[sərker′ē·ə] pl. cercariae
Etymology: Gk, kerkos, tail
a minute, wormlike early developmental form of trematode. It develops in a freshwater snail, is released into the water, and swims toward the sun, rising to the surface of the water in the warmest part of the day. Cercariae enter the body of the next host by ingestion, by direct invasion through the skin, or through a cut or other break in the skin. Some cercariae of the genera Schistosoma, Chlonorchis, Paragonimus, Fasciolopsis, and Fasciola are known to infect humans. They encyst and complete their development in various organs of the body. Each species tends to migrate to one organ, such as Fasciola hepatica, which grows to become a liver fluke. See also fluke, schistosomiasis.

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]

cercaria

The tailed, swimming larva of a trematode worm, such as a SCHISTOSOME.

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.

Cercaria (plural, cercariae)

An intermediate-stage of the fluke larva, released into water by infected snails.
Mentioned in: Fluke Infections

cercaria

pl. cercariae [Gr.] the final, free-swimming larval stage of a trematode parasite.
References in periodicals archive ?
Measurements given in the description of each cercaria are based on heat-killed and formalin-fixed specimens and expressed in micrometers (qm), with range followed by the mean [+ or -] SD in parentheses.
Hugghins (1954) described the life cycle of Hysteromorpha triloba (Rudolphi, 1819) whose cercaria is similar to Furcocercaria XIX in the morphology of the penetration gland cells, presence of three circles of spines surrounding the opening of the ventral sucker, number and position of sensory hairs on the body (one pair) and several pairs in the tail stem, resting position, size of the body (168-221/41-50 H.
Para visualizar las cercarias en los moluscos, se utilizo la tecnica de analisis de aplastamiento, estereoscopia y microscopio de luz (40X y 100X).
Sobre una cercaria de la familia Schistosomatidae (Digenea) parasita de Chilina gibbosa Sowerby, 1841 en el Lago Pellegrini, Provincia de Rio Negro, Republica Argentina.
The life cycle of this digenean was first completed by Ostrowski de Nunez [6] in Argentina working with Pleurolophocercous cercaria released from the naturally infected Litoridina castellanosae (= Heleobia castellanosae (Gaillard, 1974) (Gastropoda: Hydrobiidae).
Description of redia and cercaria of Paragonimus peruvianus from experimentally infected Aroapyrgus colombiensis of Condebamba Valley, Peru.
Ademas, senalan que el numero de celulas flamigeras en las metacercarias no debe considerarse un criterio para la clasificacion de las especies de Paragonimus ya que este numero varia en los estadios cercaria y metacercaria, y a su vez cambia dentro de cada estadio a medida que el parasito va madurando (Blair et al.
Tipos de cercaria de trematodos en algunas zonas del Peru.
The cercaria of Centrocestus formosanus is small, oculate, gymnocephalous (distome, leptocercous according to Amaya-Huerta and Almeyda-Artigas, 1994).
miracidium, cercaria, metacercaria and mesocercaria (Esch & Fernandez, 1994; Esch, Barger & Fellis, 2002).
Of 633 molluscs examined, 13 were infected with cercariae from the Pleurolophocercous group, which turned out to be the cercaria of Haplorchis pumilio.
Studies on the life history of Spelotrema nicolli (Trematoda: Microphallidae) with a description of a new microphallid cercaria.