After entry into humans, the plerocercoid
larvae (spargana) migrate to different anatomic locations, where they cause space-occupying lesions as they develop into adults.
diaglenae and Parapharyngodon chamelensis for the first time in Colima, while the plerocercoid
of the family Proteocephalidae and the nematodes Aplectana and Physalopteroides bahamensis, as well as the oligochaete Dero (Allodero), represent new records for the shovel-headed treefrog.
Sparganosis is a parasitic infection caused by the plerocercoid
larvae of the genus Spirometra.
The infected Cyclops is then ingested by a small freshwater fish (second intermediate host) where the procercoid is released and penetrates the intestinal wall of the fish developing to a plerocercoid
larva (sparganum) in the fish's muscles or viscera.
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).
All parasites were plerocercoid
stages inhabiting the liver and body cavity.
148) La second larval stage a procercoid (149) La third larval stage a plerocercoid
(150) La protein embedments in epidermis of hexacanth (151)
diplolister from the Caatinga of Pernambuco State: Raillietnema spectans Gomes, 1964 (Nematoda: Cosmocercidae) and Plerocercoid
larvae of the family Proteocephalidae (Cestoda).
Tapeworm larva in which the scolex is embedded in an enlarged tail; for example in Diphyllobothrium latum.
The finding of plerocercoid
larvae of Diphyllobothriidae Luhe, 1910 (Cestoda) in Peruvian sea fish.
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.
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).