The intestinal adenoma complex (IAC) was detected in 30 swine, or in 0.02% of the swine examined by meat inspectors over one year ending in October 1981. Of the 30 swine, which were 6-month-old hogs, 14 were affected with porcine intestinal adenoma (PIA), 6 with regional ileitis (RI), 5 with necrotic enteritis (NE), one was with proliferative hemorrhagic enteritis (PHE), one with RI/PIA, and 3 were with an unknown type of IAC.
Histopathologically, adenomatous hyperplasia of mucosal epithelial cells was a common finding. In addition, fibrosis of the mucosa and enlargement of the muscle layer were found in RI, pseudomembranous formation was in NE, and mucosal hyperemia, hemorrhage, and severe inflammatory reaction were in PHE. Bacteria looking like those of
Campylobacter sputorum subsp.
mucosalis were detected from the cytoplasm of hyperplastic epithelial cells in the swine affected with these types of IAC.
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