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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 ?
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.
Some researchers have been examining a hypothesis that Japanese masu salmon are infected with the plerocercoid not in freshwater but in the sea during their migration through the Sea of Okhotsk, possibly through another intermediate host that links the freshwater copepod and the wild salmon at sea (14).
During the past 55 years, work by Chilean parasitologists has demonstrated that native species and introduced salmonid fish are infested with Diphyllobothrium plerocercoids in these lakes (11-14).
candamarcensis latex and the structural similarity between cysteine proteinases and a growth factor from plerocercoids were recently described (Silva et al.
If the fish are merely chilled, plerocercoids of diphyllobothriids may survive for several days (10).
Humans are infected by ingesting raw or undercooked fish infected with larval plerocercoids.
latum plerocercoids infections; another possibility is that the life cycle of D.