Encyclopedia of Parasitology

Living Edition
| Editors: Heinz Mehlhorn

Crystalloid Body

  • Heinz Mehlhorn
Living reference work entry
DOI: https://doi.org/10.1007/978-3-642-27769-6_4222-1

This structure appears in electron microscopy as compact globules of several micrometers (μm) in diameter consisting of electron-dense particles arranged in a honeycomb-like pattern. The size of these particles varies depending on the species. In the hemogregarine Karyolysus, they measure 35–50 nm in diameter, in Cystoisospora only 30 nm, in Cryptosporidium they reach 16–35 nm, and in Plasmodium ookinetes and oocysts they measure about 43 nm and occur at several places (Figs. 2 and 3 in Kinetes). The functional role of the crystalloid bodies is still unknown, although they are discussed as reserve granules and/or as systems to regulate cryoprotection and intracellular osmolielity.


Electron Microscopy Functional Role Compact Globule Crystalloid Body Reserve Granule 
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Further Reading

  1. Lemgruber L, Lupetti P (2012) Crystalloid body, refractile body and virus-like particles in Apicomplexa: what is in there? Parasitology 139:285–293CrossRefPubMedGoogle Scholar
  2. Mehlhorn H, Markus MB (1976) Electron microscopic studies of Isospora felis of the cat in mesenteric lymph nodes of the mouse. Parasitol Res 51:15–24Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Institut für Zoomorphologie, Zellbiologie und ParasitologieHeinrich-Heine-UniversitätDüsseldorfGermany