RESUMO
Bothrops alternatus venom was intramuscularly inoculated (3mg/kg) into 12 dogs, 30 to 65 days old. Spontaneou bleeding commenced twenty minutes later. Blood samples obtained 3 and 20 minutes after venom inoculation presented spontaneuous clotting formation. Plasmatic fibrinogen decreased within 3 minutes. Partial thromboplastin time (PTT) and one-stage prothrombin time (PT) were found. Plasma did not coagulate 40 minutes after inoculation. Platelet counts did not vary but their function was altered. Histopathology pointed out severe muscular necrosis and massive hemorrhage in the inoculation area. Regional ganglia showed intense hemorrhage. The 45 and 65-day-old animals showed alveolar thickening of the septum and generalized congestion, but the 30-day-old animals showed thrombosis of small arteries and arterioles. Renal lesions were different with the age. Cortical tubular necrosis was present in puppies, and intense cortical tubular hydropic degeneration was present in adult dogs. Thymus hemorrhage and necrosis were present.
Assuntos
Animais , Cães , Bothrops , Mordeduras de Serpentes/sangue , Venenos de Crotalídeos/sangue , Fatores de Coagulação Sanguínea , Tempo de Tromboplastina Parcial , Contagem de Plaquetas , Mordeduras de Serpentes/patologiaRESUMO
Bothrops alternatus venom was inoculated in gastrocnemius muscle of mice between 18 and 20g. The dose was 50 micrograms in 0.1 ml in ClNa 0.85% solution. Groups of 5 animals were sacrified between 3, 6 and 12 hours after inoculation. Hystopathology was performed with muscle and different organs fixed with Bouin. The venom reproduced a local inflammatory reaction. Histopathology observations of muscle revealed myolytic and coagulative necrosis. There and six hours after inoculation, hepatocellular degeneration and tumefaction in area of central veins was observed. In kidneys there were cortical congestion and hydropic tumefaction of proximal and distal tubules. There were no anormality in heart, lung and brain.