PMC4992205_01
Pig. Colon. a Normal colon lined by columnar epithelial cells. b Superficial, erosive colitis with infiltration of neutrophils into the lamina propria and effusion into the lumen - 'volcano lesion' (arrow) (Haematoxylin and eosin 20x)
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PMC4992205_01_13620_2016_70_Fig1_HTML.jpg
Fig1
On histopathological examination three of the piglets had mild (n = 1) to severe (n = 2), multifocal, superficial fibrinosuppurative and erosive colitis with neutrophils and fibrin spilling from lamina propria through the eroded epithelium and into the lumen ('volcano lesions') (Fig. 1).