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Cholelithiasis in owl monkeys: seven cases.

J F Baer1, R E Weller, G E Dagle

  • 1College of Veterinary Medicine, Washington State University, Pullman 99163.

Laboratory Animal Science
|November 1, 1990
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Summary
This summary is machine-generated.

Seven owl monkeys developed gallstones, primarily composed of cholesterol. Clinicopathologic findings included weight loss, anemia, and elevated liver enzymes, but the cause of gallstones in these animals remains unknown.

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Area of Science:

  • Veterinary Pathology
  • Primate Medicine
  • Gastroenterology

Background:

  • Spontaneous gallstone formation (cholelithiasis) is uncommon in non-human primates.
  • Understanding gallstone composition and potential contributing factors is crucial for animal health and research models.

Observation:

  • Necropsy revealed spontaneous cholelithiasis in seven owl monkeys (Aotus spp.), with no significant gross or microscopic gallbladder abnormalities.
  • Affected animals exhibited clinical signs including weight loss, anemia, elevated alanine aminotransferase (ALT) and gamma-glutamyl transpeptidase (GGT), and hyperbilirubinemia.

Findings:

  • Gallstones from five owl monkeys were analyzed, revealing a composition of 89% cholesterol.
  • The presence of cholesterol-rich gallstones in the absence of gallbladder pathology suggests a metabolic or dietary origin.

Implications:

  • This study highlights cholesterol gallstones in owl monkeys, potentially offering insights into primate gallstone formation.
  • Further research is needed to elucidate the etiopathogenesis of cholelithiasis in this species, which could inform husbandry and clinical management.