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  • 1 Central Veterinary Institute H-1149 Budapest Tábornok u. 2 Hungary
  • 2 Szent István University Department of Pathology and Forensic Veterinary Medicine, Faculty of Veterinary Science Budapest Hungary
  • 3 Veterinary Institute of Kaposvár of the Central Veterinary Institute Kaposvár Hungary
  • 4 Waterfowl Breeding Unit of Bábolna Co. Ltd. Bábolna Hungary
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Ten one-day-old goslings were inoculated orally with a Brachyspira alvinipulli strain isolated from the large intestine of geese that had died of intestinal spirochaetosis (Group A), 10 day-old goslings were inoculated orally with a B. hyodysenteriae strain (Group B), and a third group of 10 goslings (Group C) served as uninfected control. The goslings were observed daily for clinical signs. They were sacrificed on days 7, 14, 21 and 35 days postinfection (PI), and necropsied. Segments of the large intestine were subjected to histopathological, immunohistochemical, electron microscopic (TEM, SEM) and microbiological examinations. Mortality did not occur during the experimental period. However, in both groups the caecum of the goslings killed by bleeding was slightly dilated, in its lumen there was a watery, yellowish and frothy content, and the mucous membrane was slightly swollen. By histopathological, immunohistochemical and electron microscopic examination, B. alvinipulli and B. hyodysenteriae could be detected in the caecum or colon, in the lumen of the glands and sometimes among the glandular epithelial cells in goslings of the respective groups, and could be reisolated from these organs by culturing. A mild inflammation of the intestinal mucosa was also noted. In transverse section of the brachyspirae, numerous (16–22) periplasmic flagella could be detected inside the outer sheath, also depending on the plane of section.

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