Spontaneous poisoning by Dodonaea viscosa (Sapindaceae) in cattle in Southern Brazil

ABSTRACT: In this study, an outbreak of spontaneous poisoning by Dodonaea viscosa (D. viscosa) in a herd dairy cattle the municipality Capão do Leão, Rio Grande Sul, was investigated. Three deaths occurred batch 16 Jersey cattle, aged between three and four years, kept native field. The clinical signs observed were apathy, decreased production, anorexia, with death occurring within approximately 48 h after onset signs. necropsied, tissue samples sent for histopathological examination. Necropsy findings included serosanguineous fluid abdominal cavity, intestines congested serosa, marked mesenteric edema. mucosa abomasum two animals hemorrhagic bloody content, among ruminal content bovine, leaves morphological characteristics compatible D. observed. livers enlarged, accentuation lobular pattern. Histologically, centrilobular coagulation necrosis congestion hemorrhage liver. Vacuolization degeneration hepatocytes mid-zonal periportal regions. diagnosis based on epidemiological data, necropsy findings, alterations. presence plant rumen grazing site affected essential diagnosis.