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Related Experiment Videos

Anury in two Cairn terriers.

D S Hall1, J F Amann, G M Constantinescu

  • 1Department of Veterinary Biomedical Sciences, College of Veterinary Medicine, University of Missouri, Columbia 65211.

Journal of the American Veterinary Medical Association
|November 1, 1987
PubMed
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Congenital anury, or taillessness, in Cairn Terriers is likely hereditary. Affected dogs lacked muscles essential for defecation, leading to hind limb fecal staining.

Area of Science:

  • Veterinary Genetics
  • Canine Morphology
  • Animal Reproduction

Background:

  • Congenital anury (taillessness) is a rare condition observed in domestic animals.
  • Previous studies in other species, like mice, have linked anury to genetic factors and potential lethality.
  • Clinical signs in affected dogs included fecal staining of hind limbs, indicating defecation issues.

Purpose of the Study:

  • To investigate the cause of congenital anury in two affected Cairn Terriers.
  • To determine the underlying anatomical and potential hereditary factors contributing to the condition.

Main Methods:

  • Clinical examination and observation of affected dogs and their offspring.
  • Radiographic imaging of the caudal and sacral vertebrae.
  • Myelography and electrodiagnostic testing of anal sphincter function.

Related Experiment Videos

  • Post-mortem examination (necropsy) of one affected dog.
  • Pedigree analysis to assess hereditary patterns and inbreeding.

    • Main Results:

    • Affected dogs exhibited atypical caudal and sacral vertebrae.
    • One dog lacked specific muscles crucial for normal defecation, explaining the fecal staining.
    • Offspring from affected parents appeared normal, but litter size was small, suggesting possible lethal gene combinations.
    • Pedigree analysis indicated close relatedness and slight inbreeding in the affected dogs.

    Conclusions:

    • Congenital anury in these Cairn Terriers is likely due to a hereditary factor.
    • The condition involves anatomical defects, specifically muscle agenesis, affecting defecation.
    • Further research into the specific genetic mutation is warranted.