Original research paperUltrastructure of developing taeniid embryophores and associated structures
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Cited by (23)
DNA extraction in Echinococcus granulosus and Taenia spp. eggs in dogs stool samples applying thermal shock
2018, Experimental ParasitologyCitation Excerpt :They are highly resistant to the environment because they present a thick layer of glycoproteins called embryophore, which efficiently protects the oncosphere or hexacanth embryo (Smyth and Cleeg, 1959). In this way, the eggs resist extreme environmental conditions and only hatch when they are ingested by intermediary hosts, where the embryophores degradation is activated by the action of gastric juices, pancreatic and biliary secretions of the digestive tract (Morseth, 1965; Seung, 1971). The eggs produced by this family of parasites are morphologically similar, which makes necessary the application of techniques to discriminate species through molecular analysis (Cabrera et al., 2002).
Survival, physical and physiological changes of Taenia hydatigena eggs under different conditions of water stress
2017, Experimental ParasitologyCitation Excerpt :Wang et al. (1981) proposed that the sub-unit pores are part of a network system whose functions can be related to the breathing of embryos, to humidity control through the egg external shell and to the provision of nutritional material for the development of the oncosphere. Furthermore, Morseth (1965) argued that these pores are related to the replacement of the embryophore material, the latter elongating from the base at the expense of the deposit of substances coming from the internal membrane. Thus the sub-units would gradually add constituent material and increase in length from the internal and lower area of the embryophore causing the displacement of the pores to the upper area.
Biology and Systematics of Echinococcus
2017, Advances in ParasitologyCitation Excerpt :Taeniid eggs are spherical to ellipsoid in shape and usually range in size from 30 to 50 μm and from 22 to 44 μm in their two diameters. They are morphologically indistinguishable at the light microscope level and ultrastructural studies of the eggs of E. granulosus, E. multilocularis and various Taenia species have shown that they possess similar structures consisting of several layers and membranes (Fig. 6) (Morseth, 1965; Sakamoto, 1981; Swiderski, 1982). The embryophore is the principal layer affording physical protection to the embryo, or oncosphere, since the vitelline layer (‘egg shell’ or outer envelope) is passively removed from the egg before it is liberated.
Ultrastructural reconstruction of Taenia ovis oncospheres from serial sections
2010, International Journal for ParasitologyEchinococcus granulosus: Hook-muscle systems and cellular organisation of infective oncospheres
1983, International Journal for ParasitologyStudies on Anoplotaenia dasyuri Beddard, 1911 (Cestoda: Taeniidae), a parasite of the Tasmanian devil: Observations on the egg and metacestode
1975, International Journal for Parasitology