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- W1983608765 abstract "Intestinal histopathological changes due to infection with Echinostoma hortense (Trematoda) were studied in rats after experimental infection with the metacercariae. The metacercariae were obtained from the tadpoles of Rana nigromaculata, a second intermediate host infected in the laboratory. Total 18 albino rats (Sprague-Dawley) were given 200 matacercariae each and sacrificed on the day 1, 3, 7, 11, 22 or 44 post-infection (PI). Segments of the small intestine at 1, 3, 5, 8 and 30 cm posterior to the pylorus (PTP) were resected and studied histopathologically. 1. The flukes were seen to have intruded into the intervillous space in the upper small intestine at early stages (1-3 days PI), however, they were located mainly in the intestinal lumen at later stages (7-44 days PI). The flukes were sucking and destroying the epithelial layers of villi with their oral and ventral suckers. 2. Histopathological changes of the intestine were recognizable in as early as 1-3 days after infection, and the changes became severer as the infection progressed. 3. The intestinal mucosa was histopathologically characterized by villous atrophy and crypt hyperplasia throughout the infection period. Major villous changes were blunting, fusion, severe destruction and loss of epithelial layers of villi. Villous/crypt (V/C) height ratio was remarkably reduced from 3:1 in controls to 1:1 in severely infected animals. In the stroma of villi, inflammatory cell infiltrations, vascular congestion, edema, and/or fibrosis were recognized. The goblet cells were increased in number after 11 days PI.(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W1983608765 date "1990-01-01" @default.
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- W1983608765 title "Chronological observation of intestinal lesions of rats experimentally infected with Echinostoma hortense" @default.
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- W1983608765 doi "https://doi.org/10.3347/kjp.1990.28.1.45" @default.
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