plerocercoid

[‚plir·ə′sər‚kȯid]

(invertebrate zoology)

The infective metacestode of certain cyclophyllidean tapeworms; distinguished by a solid body.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

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References in periodicals archive

Parasites were in the plerocercoid stage and inhabited the body cavity.

Comparison of parasites of mummichogs and sticklebacks from brackish and freshwater ponds on Sable Island, Nova Scotia

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.

Macroevolutionary patterns of morphological diversification among parasitic fl atworms (platyhelminthes: Cercomeria)

Characterization of Spirometra erinaceieuropaei plerocercoid cysteine protease and potential application for serodiagnosis of sparganosis.

Molecular identification of Spirometra erinaceieuropaei tapeworm in cases of human Sparganosis, Hong Kong

For R spectans, the prevalence was 15.6% and for the plerocercoid cestode larvae 3.1%.

Helminths of the frog Pleurodema diplolister (Anura, Leiuperidae) from the Caatingain Pernambuco State, Northeast Brazil

Plerocercoid larvae of Diphyllobothriidae Luhe, 1910: finding in Peruvian sea fish for human consumption.

Pacific broad tapeworm Adenocephalus pacificus as a causative agent of globally reemerging diphyllobothriosis

3.3 1-3 2.00 [+ or -] 1.41 Neobenedenia 8.3 1-2 1.26 [+ or -] 0.40 melleni Octoplectanocotyla 12.5 1-4 1.52 [+ or -] 1.10 travassosi Pseudempleurosoma 16.7 1-6 1.64 [+ or -] 1.30 guanabarensis Cestoda Callitetrarhynchus 12.5 1-12 3.68 [+ or -] 3.18 gracilis (plerocercoid) Scolex polymorphus 65 1-832 60.0 [+ or -] 146.40 (metacestode) Acanthocephala Polymorphus sp.

Seasonal variation in metazoan parasites of Trichiurus lepturus (Perciformes: Trichiuridae) of Rio de Janeiro, Brazil

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.

Utilization of the trophic structure of small pond ecosystems by helminths of frogs, Rana catesbeiana and Rana utricularia

1.6 1 CHIOC N[degrees] 36665 Microcotyle pseudopercis 62.9 7.2 [+ or -] 8.9 CHIOC N[degrees] 36667/36688 Pseudempleurosoma gibsoni 4.8 1 CHIOC N[degrees] 36668/36685 Cestoda Callitetrarhynchus gracilis 1.6 1 (plerocercoid) CHIOC N[degrees] 36669 Nybelinia sp.

Community ecology of the metazoan parasites of namorado sandperches, Pseudopercis numida Miranda-Ribeiro, 1903 and P. semifasciata Cuvier, 1829 (Perciformes: Pinguipedidae), from the coastal zone of the State of Rio de Janeiro, Brazil/Ecologia da comunidade de metazoarios parasitos dos namorados, Pseudopercis numida e P. semifasciata (Perciformes: Pinguipedidae), do litoral do estado do Rio de Janeiro, Brasil

To the Editor: Sparganosis is a parasitic zoonosis caused by invasion of the spargana, the plerocercoid larvae of various diphyllobothroid tapeworms belonging to the genus Spirometra (1).

Sparganosis, Henan Province, Central 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).

Enzootic sparganosis in Guangdong, People's Republic of 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).

Diphyllobothriasis associated with eating raw Pacific salmon

The plerocercoid larvae in the fish muscles are easily missed during food preparation.

Diphyllobothrium latum outbreak from marinated raw perch, Lake Geneva, Switzerland