PERSISTENT HYPERBILIRUBINEMIA IN A HORSE - A CASE-REPORT

healthy seven year old Warmblood mare showed a persistent hyperbilirub inemia over several years. This hyperbilirubinemia was mainly caused b y unconjugated bilirubin. There were no indications for a hemolytic di sorder or an acquired hepatic disease. The disorder in this horse seem s to be similar to an inherited human disorder, where a deficient gluc uronidation of bilirubin is caused by a deficiency of the enzyme bilir ubin-uridine diphosphatase glucuronyl transferase in the liver cells.