RESUMO

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.

Assuntos

Doenças dos Bovinos/patologia , Papiloma/veterinária , Neoplasias Gástricas/veterinária , Abomaso/patologia , Abomaso/virologia , Animais , Antígenos Virais/análise , Bovinos , Doenças dos Bovinos/virologia , Imuno-Histoquímica/veterinária , Microscopia Eletrônica/veterinária , Papiloma/patologia , Papillomaviridae/imunologia , Neoplasias Gástricas/patologia , Neoplasias Gástricas/virologia