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- W2070791978 abstract "Two strains of pathogenic Naegleria were employed to infect mice and monkey kidney (Vero line) cell cultures. Mice were infected intranasally. Moribund mice were sacrificed and their brains processed for light and electron microscopy. The normal architecture of the infected brain was completely destroyed; the olfactory lobes and the cerebral cortex showed the heaviest damage. The inflammatory response was mainly in the form of neutrophil polymorphs (PMN) and was confined to the olfactory lobes and the superficial regions of cerebral cortex. Numerous amebas were seen interspersed with the degenerating neurons, glial processes, and PMN. Most conspicuous were the food vacuoles which contained host tissue in various stages of digestion. Amebas in the brain tissue also produced many micropinocytotic vesicles from the surface of the plasma membrane. These vesicles are interpreted as vehicles of transport of nutritive materials from the host tissue. The infected cell culture showed the characteristic cytopathic effect (CPE). The CPE was chiefly in the form of cell shrinkage, nuclear pycnosis and discontinuity of cell sheet. Amebas were often seen in an intracellular location. The Vero cells produced many fuzzy pinocytotic vesicles at these loci where the ameba plasma membrane and Vero cell membrane were in close apposition; the probable significance of this is discussed. Most impressive, however, were the pseudopodial formation and capturing of the host material which indicated the great phagocytic activity of the amebas. This was confirmed further by the presence of large numbers of food vacuoles containing host material in various stages of digestion. These observations show that the amebas invade and destroy the brain tissue by active phagocytosis." @default.
- W2070791978 created "2016-06-24" @default.
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- W2070791978 date "1974-05-01" @default.
- W2070791978 modified "2023-10-16" @default.
- W2070791978 title "Light and Electron Microsopic Observations on the Pathogenesis of<i>Naegleria fowleri</i>in Mouse Brain and Tissue Culture" @default.
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- W2070791978 doi "https://doi.org/10.1111/j.1550-7408.1974.tb03648.x" @default.
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