cercaria


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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 ?
The host-parasite interface and associated structures of the cercaria and adult Neophasis lageniformis (Lebour, 1910).
Thus, the fellodistomid cercaria observed in the present study likely belongs to the subfamily Baccigeriinae.
Cercaria tenuans, larval trematode parasite of Mytilus and its significance in mussel culture.
The cercaria larvae develop in snails, the first intermediate host; the cercariae encyst as metacercariae in the tissues of a suitable fish, which is the second intermediate host for the parasite.
La emision de las cercarias es pasiva, siendo expelidas desde la cavidad corporal del molusco, con un incremento de presion que origina el escape a traves de la apertura respiratoria, esta salida es irregular con emisiones promedio de 203 cercarias por miracidio y 270 cercarias por caracol [14], habiendose detectado la mayor produccion cercariana es entre las 12 pm y la 1 am [15].
Pattern of emergence and the effects of temperature and light on the emergence and survival of heterophyid cercaria (Centrocestus formosanus and Haplorchis pumilio).
synonym Cercaria cursitans, Holliman, 1961) and Probolocoryphe lanceolata (synonym Cercaria lanceolata, Holliman, 1961; Probolocoryphe glandulosa.
Esto significa que este autor mantiene una firme creencia en la objetividad cientifica y en la posibilidad de alcanzar una supuesta realidad concreta que nos cercaria (Searle, 1995).
Este hecho se encuadra principalmente en que gran parte de los visitantes no siempre eligen pernoctar, debido a la cercaria a Madrid, y al desarrollo de gran cantidad de alojamientos de turismo rural, donde se ha pasado de 136 en el ano 2000 hasta 862 en el ano 2010, y todo esto a pesar de la crisis economica.
1942 Caecincola Micropterus Intestine Venard, 1940 parvulus salmoides Cathaemasia Ceryle alcyon Intestine Harwood, reticulata 1936 Cercaria corti Helisoma Digestive Gland Byrd & trivolvis Reiber, 1940 C.
In the current study, the protein parasite repertoire was studied using a proteomic approach of two different parasite stages, the cercaria and adult worms from a Venezuelan isolate (JL).