EN
The studies were carried out on 35 European bisons of both sexes and various age. The animals were culled for the following reasons: poor condition, old age, lameness and diseases of the reproductive tract in males. Blood for biochemical tests was collected from the extern jugular vein, and the carcasses were autopsied and histopathologi- cally examined. An analysis of the relationships between selected biochemical blood parameters (total protein, immunoglobulins, urea, uric acid, alkaline phosphatase) points to the role of disorders of the urinary tract in males in the pathogenesis of diseases of the penis and prepuce. The results also suggest that disorders of the urinary tract which are common in both male and female European bisons incraese their susceptibility to other diseases.