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(invertebrate zoology)
The infective metacestode of certain cyclophyllidean tapeworms; distinguished by a solid body.



one of the larval stages in the development of tapeworms (the broad fish tapeworm, Liguld). The body measures 2–80 cm long and is unsegmented. A fish (the second intermediate host of tapeworms) swallows a copepod (the first intermediate host) containing a larva—the procercoid. The larva penetrates the wall of the fish’s intestine to the body cavity, where it is converted to a plerocercoid. If the definitive host (a man, dog, or cat for the broad fish tapeworm; aquatic birds for Liguld) eats the affected fish, the plerocercoid is transformed into an adult worm in the new host’s intestine.

References in periodicals archive ?
Characterization of Spirometra erinaceieuropaei plerocercoid cysteine protease and potential application for serodiagnosis of sparganosis.
We found material assigned to Proteocephalidea in the plerocercoid stage, presenting a scolex with four simple suckers; both characteristics correspond to the order (Khalil et al.
Sparganosis is an infection caused by the plerocercoid larvae (spargana) of various diphyllobothroid tapeworms belonging to the genus Spirometra.
After ingestion of the infected fish, the plerocercoids develop into immature adults and then into mature adult tapeworms, which will reside in the small intestine.
Of these, the loss of an axoneme in the sperm's tail (male) and the loss of cilia on hexacanths and tails on plerocercoids (larval) occur more than once.
Plerocercoid larvae of Diphyllobothriidae Luhe, 1910: finding in Peruvian sea fish for human consumption.
Accordingly, the route of plerocercoid infection for humans in Henan Province differs from that in southern China.
To the Editor: Sparganosis is a worldwide parasitic zoonosis caused by infection with spargana, the plerocercoid larvae of various diphyllobothroid tapeworms belonging to the genus Spirometra (1-3).
To the contrary, an investigation of mature masu salmon captured in the rivers in Hokkaido showed a plerocercoid infection rate of 20%, although no plerocercoids were found in masu salmon juveniles that stayed in the rivers for 1.
The plerocercoid larvae in the fish muscles are easily missed during food preparation.
latum is transmitted to humans by plerocercoid larvae present in fish meat and visceral organs (www.