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Updated: Jun 7, 2026

Catheterization of Intestinal Loops in Ruminants
Published on: June 11, 2009
Upper alimentary tract papillomas in calves related to papillomavirus infection
Winston E Morris1, Agustín J Venzano, María Isabel Craig
1Veterinary and Agronomic Research Centre, National Institute of Agricultural Technology, Castelar, Argentina. wmorris@cnia.inta.gov.ar
Abstract:
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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