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  • Title: Cholestasis associated with extrahepatic bacterial infection in five dogs.
    Author: Taboada J, Meyer DJ.
    Journal: J Vet Intern Med; 1989; 3(4):216-21. PubMed ID: 2585368.
    Abstract:
    Intrahepatic cholestasis associated with severe extrahepatic bacterial infection is well recognized in humans. A similar syndrome is not well characterized in veterinary medicine. Five dogs with severe extrahepatic bacterial infection that developed histologically confirmed intrahepatic cholestasis were selected from the authors' case files. The types of infections included pneumonia, peritonitis secondary to a rectal tear, urinary tract infection, bite wounds, and vegetative endocarditis. Escherichia coli was involved in two of the dogs, mixed infection in one dog, and a gram-positive cocci in the other two dogs. Total bilirubin concentrations ranged from 3.5 to 33.5 mg/dl. Serum liver enzyme activities showed only mild to moderate increases: alkaline phosphatase (ALP, 41-750 IU/l), alanine aminotransferase (ALT, 25-235 IU/l), and aspartate aminotransferase (AST, 99-255 IU/l). Fasting serum bile acids concentration was markedly elevated in the one dog in which it was measured (259 mumol/l). Histologically, the cholestasis was characterized by bile pigment accumulation in hepatocytes, canaliculi, and/or Kupffer's cells. Inflammatory parenchymal changes, when present, were minimal. The findings of hyperbilirubinemia, only a slight increase in the liver enzyme activities, and minimal inflammatory changes in liver tissue specimens in the five dogs with extrahepatic bacterial infections are similar to the findings in intrahepatic cholestasis associated with extrahepatic bacterial infection in humans.
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