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Pyrrolizidine alkaloids (PAs) are natural phytotoxins found in thousands of plant species around the world. They are probably the most common poisonous plants affecting livestock, wildlife and humans. The disease occurs almost entirely as a consequence of chronic poisoning and in general ends fatally. In the present study, PAs poisoning was investigated in a gazelle with hepatic encephalopathy associated with severe neurologic signs. The main clinical signs included head pressing, progressive depression and weakness, ataxia and reluctance to move, turn the head to the left and to paddle, hyperesthesia and decreased food intake. Histopathological examination revealed major lesions in the liver consisting of severe hepatocyte megalocytosis and hypertrophy with nuclei enlargement, mild bile duct hyperplasia, centriacinar fatty change and hepatocellular necrosis. Moreover, pulmonary congestion and edema with endothelium necrosis and alveolar septa thickening, severe congestion in vessels of the brain and meninges, and myocardial necrosis were observed.

Case Report. The first report of pyrrolizidine alkaloid poisoning in a gazelle (Gazella Subgutturosa) – histopathologic diagnosis