Acta Parasitologica

, Volume 56, Issue 1, pp 40–47 | Cite as

Ultrastructural and cytochemical studies of GER-bodies in the intrauterine eggs of Wenyonia virilis Woodland, 1923 (Cestoda, Caryophyllidea)

  • Daniel Młocicki
  • Zdzisław Świderski
  • John S. Mackiewicz
  • Mohammed H. Ibraheem


Ultrastructural and cytochemical characteristics of GER-bodies observed in the vitellocyte cytoplasm of the intrauterine eggs of the caryophyllidean cestode Wenyonia virilis are described. In this species GER-bodies were observed only in the cytoplasm of vitellocytes, surrounded by a newly formed egg-shell. They are composed of spherical areas of condensed, electron-dense cytoplasm which contains concentrically arranged parallel lamellae of granular endoplasmic reticulum (GER), forming characteristic balls of different sizes. Each GER-body is surrounded by numerous free ribosomes, polyribosomes, α-glycogen rosettes and large mitochondria. Results of cytochemical analysis by means of PATSC-SP test for polysaccharides indicated that glycogen is absent within the GER-bodies, however, a strongly positive reaction was observed only in large aggregations of α-glycogen rosettes and β-glycogen particles, localised usually near GER-bodies.


Wenyonia virilis Caryophyllidea cytochemistry endoplasmic reticulum GER-bodies ultrastructure 


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Copyright information

© © Versita Warsaw and Springer-Verlag Wien 2011

Authors and Affiliations

  • Daniel Młocicki
    • 1
    • 2
  • Zdzisław Świderski
    • 1
    • 2
  • John S. Mackiewicz
    • 3
  • Mohammed H. Ibraheem
    • 4
  1. 1.W. Stefański Institute of ParasitologyPolish Academy of SciencesWarsawPoland
  2. 2.Department of General Biology and ParasitologyMedical University of WarsawWarsawPoland
  3. 3.Department of Biological SciencesState University of New York at AlbanyAlbanyUSA
  4. 4.Department of Zoology, Faculty of ScienceMinia UniversityEl-MiniaEgypt

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