a gram-negative coccobacillus, is primarily a pathogen of rodents. In addition to farm and domestic animals, birds are also natural reservoirs. Five affected lambs were presented with the signs of diarrhoea and emaciation. Grossly, there were intestinal effusions and enlargement of mesenteric lymph nodes. The most important macroscopic finding was whitish hepatic foci. Histopathological examination revealed fibrinohemorrhagic enterocolitis and multiple foci of coagulative necrosis associated with microabscess formation in the liver. The isolated organism, based on morphological and biochemical characteristics confirmed as Yersinia pseudotuberculosis.

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