RESUMO
We report two cases of lethal avian malaria in Magellanic Penguins (Spheniscus magellanicus) captive at San Clemente del Tuyú, Argentina, approximately 560 km north of Argentinean breeding colonies of Magellanic Penguins. Blood smears revealed both penguins were concurrently infected by Plasmodium (Haemamoeba) tejerai, Plasmodium (Huffia) sp., and Plasmodium (Novyella) sp.
Assuntos
Malária Aviária/parasitologia , Spheniscidae , Animais , Animais de Zoológico , Argentina/epidemiologia , Evolução Fatal , Malária Aviária/epidemiologiaRESUMO
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/virologiaRESUMO
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.