Upper alimentary tract papillomas in calves related to papillomavirus infection
2010
Morris, Winston E. | Venzano, Agustin J. | Craig, Maria Isabel | Diodati, Julian A. | Funes, Daniel | Elizondo, Ana | Mercado, Elsa | Capellino, Felix | Delgado, Fernando | Blanco-Viera, Javier
This study reports 3 cases of spontaneous papillomavirus infection in 1-week-old calves. Thickening of the omasum and abomasum wall, with acute inflammation, necrosis, ulceration, and neoplastic changes were seen in 1 calf. In the other 2, small papillomas were observed in the omasal mucosa, exhibiting proliferation of the parakeratinized epithelium. Papillomavirus antigens were detected by immunohistochemistry and virus-like particles were seen through electron microscopy.
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