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/virologiaAssuntos
Leptospira interrogans serovar pomona/patogenicidade , Leptospirose/veterinária , Placenta/microbiologia , Complicações Infecciosas na Gravidez/veterinária , Aborto Animal/etiologia , Animais , Apoptose , Células Endoteliais/microbiologia , Células Endoteliais/ultraestrutura , Feminino , Cobaias , Leptospirose/complicações , Leptospirose/microbiologia , Leptospirose/patologia , Placenta/ultraestrutura , Gravidez , Complicações Infecciosas na Gravidez/microbiologia , Complicações Infecciosas na Gravidez/patologiaRESUMO
The immunohistochemistry technique was evaluated in tissue samples fixed in formaldehyde saline solution 10 % and included in paraffin to be used as a lab method allowing to identify leptospires in tissues. Samples obtained from the experimental inoculation of 8 guinea pigs carriers of L. interrogans Pomona isolated from a clinical case were used. The disease was reproduced in a lab model. The histologic sections of the kidneys of the animals inoculated were subjected to histopathological studies, immunofluorescence, Warthin-Starry stain, and immunohistochemistry technique using formaldehyde-fixed samples. This technique proved to be an efficient tool for the diagnosis of leptospirosis.