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Zeitschrift für Parasitenkunde

, Volume 48, Issue 3–4, pp 251–262 | Cite as

Ultrastructural studies of the cysticercoid of Moniezia expansa (Anoplocephalidae) with special reference to the development of the cyst

  • Jennifer Caley
Article

Summary

Cysticercoids of the sheep tapeworm Moniezia expansa have been grown in oribatid mites in the laboratory. Three species of mite became infected: Xenillus tegeocranus, Platynothrus peltifer and Euzetes globulus, the latter not previously recorded as a host of anoplocephalines. Cysticercoids aged 15 and 28 weeks were examined with the electron microscope. Four distinct types of cells were found in the 15-week cysticercoid. Subsequent cyst development involves a transformation from a cellular to a mainly fibrous structure. The fibres, arranged in three layers, resemble collagen fibres described elsewhere. The outer epidermis of the cyst is replaced by an amorphous, electron-dense outer coat whose nature is unknown. The inner part of the cyst becomes condensed to a myelin-like structure. The scolex develops features characteristic of the adult tapeworm.

Keywords

Collagen Electron Microscope Special Reference Collagen Fibre Distinct Type 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • Jennifer Caley
    • 1
  1. 1.School of Biological SciencesUniversity of East AngliaNorwichU.K.

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