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Plerocercoid |
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plerocercoid [‚plir·ə′sər‚kȯid]
(invertebrate zoology) The infective metacestode of certain cyclophyllidean tapeworms; distinguished by a solid body. Plerocercoid 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. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | 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. candamarcensis latex and the structural similarity between cysteine proteinases and a growth factor from plerocercoids were recently described (Silva et al. plerocercoid larvae of an unknown cestode species, and the nematode Hysterothylacium aduncum were observed too infrequently (<4% prevalence in all samples) to be considered useful as biological tags (see MacKenzie and Abaunza, 1998). |
Plerocercoid |
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