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

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 eg...

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Bibliographic Details
Published in:Acta parasitologica 2011-03, Vol.56 (1), p.40-47
Main Authors: Młocicki, Daniel, Świderski, Zdzisław, Mackiewicz, John S., Ibraheem, Mohammed H.
Format: Article
Language:English
Subjects:
Animal Systematics/Taxonomy/Biogeography
Biomedical and Life Sciences
Biomedicine
Caryophyllidea
cytochemistry
Cytoplasm
Ecology
Eggs
Embryos
Endoplasmic reticulum
GER-bodies
Medical Microbiology
Microbiology
Mitochondria
Parasitology
Ribonucleic acid
RNA
ultrastructure
Wenyonia virilis
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Summary: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.
ISSN:1230-2821
1896-1851
DOI:10.2478/s11686-011-0011-4