Movement of Pomphorhynchus bulbocolli larvae from the hemocoel to the peripheral circulation of Gammarus pseudolimnaeus.
Acanthors and early acanthellae of Pomphorhynchus bulbocolli were observed in the peripheral circulation of experimentally infected laboratory-reared Gammarus pseudolimnaeus. This has not previously been reported for larval P. bulbocolli during development in the intermediate host. The timing of larval movement from hemocoel to vessels and sinuses was related to intensity of infection. In an experimental group with a low mean intensity of infection, the movement of larval P. bulbocolli into the peripheral circulation occurred later (9 days postfeeding) than in a group with a high mean intensity of infection (2 days postfeeding). Larvae were observed in the peripheral circulation for a longer period of time in amphipods from the group with the high mean intensity of infection. Dead and slightly melanized acanthors and early acanthellae were present in the hemocoel at the time living larvae moved into the peripheral circulation. Only 1 incidence of a hemocytic response to the larvae was observed in the first 20 days postfeeding.
Gleason
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LN
Department of Biology, Western Kentucky University, Bowling Green 42101.
D000049:Acanthocephala / Q000502:physiology* / Q000648:ultrastructure; D000818:Animals; D003445:Crustacea / Q000469:parasitology*; D006790:Host-Parasite Interactions; D007814:Larva / Q000502:physiology / Q000648:ultrastructure