Publications by authors named "Zh V Korneva"

The interaction of morphological changes of the uterus and fecundity of the strobilus of cestodes has been investigated. It is shown that cestodes with maximal fecundity have different and highly effective ways of supplying eggs with nutrients. It is noted that differences in fecundity of cestodes depend not only on their strategy of reproduction, ecology, and complexity of life cycles but also on the complexity of interactions between the uterus and the developing eggs.

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The comprehensive ultrastructural characteristic of the somatic tissues for the class Cestoda is presented on the basis of own and literary data: muscular, nervous systems, parenchyma and epithelial tissue. The composition of the cambial systems is summarized and characteristic of its organization are revealed in comparison with other classes of flat worms.

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This study is devoted to ultrastructural and immunosytochemical investigation of the nervous system in parasitic and free-living platyhelminthes to learn if glial cells exist in the nervous system of flatworms. We described the ultrastructure of different types of glial cells and the peculiarities of myelinization of gigantic axons; immunoreactivity to the S100b protein is revealed. Comparative analysis of the glia structure of annelids and platods is given; structural, functional, and evolutionary aspects of myelinization of gigantic axons, which are revealed in cestodes, are discussed.

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Investigations of the indigenous microflora associated with the mucous intestines of fish and its cestode parasites have been for the first time carried out using the methods of transmission and scanning electron microscopy. New data on the bacterial biodiversity in the cestode and its fish host are obtained. Nanobacteria and spirochaetes are for the first time revealed in a fish host together with the previously known bacteria forming the intestinal microflora of fish.

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The indigenous symbiotic microflora associated with the tegument of proteocephalidean cestodes and the intestines of their fish hosts has been investigated in morphological and ecological aspects. The indigenous microflora associated with the cestode tegument consists of the nannobacteria population, which was present obligatorily on the surface of tegument, and the "deep microflora". The deep microflora associates with some few species of parasites only.

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The fine structure of the female reproductive organs and ducts in two cyclophyllidean cestodes was studied by transmission electron microscopy. All the studied ducts (vitelline, fertilization and vaginal ducts, and oviducts) as well as the uterine and ootype walls have the luminal surface elevated to form apical cytoplasmic lamellae and are surrounded by bands of circular muscules, which are attached to the basement layer. The structure of the studied ducts epithelium corresponds to the pattern described in other ducts of the cestode genital system, namely a nucleate syncytial layer.

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Fine structure of genital atrium, Furman body, distal region of vagina and sac cirrus were investigated. The broad polymorphism of surface microstructures (microtriches) in various parts of copulative apparatus has been revealed. The constitution of prostate glands, being the modified cytons of syncitial epithelium of the intrabursal section of spermaduct wall, is described.

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The cellular composition of parenchyma was studied in the ontogenesis of Triaenophorus nodulosus and it was shown that the specialized parenchymal cells was absent. The extracellular matrix fibrils were synthesized successively by the tegumental cytons and muscle cells. The coracidium basal matrix consisted of electron-light and electron-dense layers, and the reticular layer appeared at the procercoid stage.

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