procercoid


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procercoid

 [pro-ser´koid]
a larval stage of fish tapeworms.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

pro·cer·coid

(prō-ser'koyd),
The first stage in the aquatic life cycle of certain tapeworms, such as the pseudophyllideans (family Diphyllobothriidae), following ingestion of the newly hatched larva (coracidium) by a copepod (water flea). The procercoid develops into a tailed larva in the body cavity of the crustacean first intermediate host; when the procercoid and its host are ingested by a fish, the procercoid enters the new host's tissues and becomes a plerocercoid.
See also: Diphyllobothrium latum, Pseudophyllidea.
[pro- + G. kerkos, tail, + eidos, resemblance]
Farlex Partner Medical Dictionary © Farlex 2012

procercoid

(prō-sûr′koid)
n.
A wormlike larval form of certain tapeworms, typically developing in a copepod.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
References in periodicals archive ?
The coracidium penetrates the intestinal wall and develops into a procercoid in the body cavity of the Cyclops.
(148) La second larval stage a procercoid (149) La third larval stage a plerocercoid (150) La protein embedments in epidermis of hexacanth (151)
Procercoid The first larval stage of pseudophyllidian tapeworms which develops from the onchosphere.
4 and 5): 1) copepods were infected by ingestion of eggs deposited in the bottom debris producing procercoid larvae (first larval stage) in the hemocoel of these hosts and 2) tadpoles ingested these infected copepods and plerocercoid larvae (second larval stage) developed in the body cavity and associated tissues of these hosts.