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A Murine Model of Irreversible and Reversible Unilateral Ureteric Obstruction
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URINARY OBSTRUCTION IN CAMELIDS AND ZOO RUMINANTS.

Angelica Ferro1, Brett Gardner2, Simon Girling3

  • 1Donald S McGregor & Partners Ltd, Thurso KW14 7EG, Scotland, United Kingdom, ferro.angelica@gmail.com.

Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians
|July 6, 2026
PubMed
Summary
This summary is machine-generated.

Urolithiasis causing urinary obstruction in male zoo animals is challenging. Surgical outcomes varied, with perineal urethrostomy and tube cystostomy showing potential, but hyperkalemia indicated poor prognosis.

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Area of Science:

  • Veterinary Medicine
  • Zoological Medicine
  • Urology

Background:

  • Urolithiasis presents a significant health risk in male zoo animals, potentially leading to complete urinary obstruction.
  • This condition has been documented across diverse species including camels, cattle, bison, and antelopes.

Purpose of the Study:

  • To review cases of urolithiasis causing complete urinary obstruction in male zoo animals.
  • To analyze surgical interventions, outcomes, and associated prognostic factors.

Main Methods:

  • Retrospective case review of ten male zoo animals with complete urinary obstruction due to urolithiasis.
  • Analysis of surgical procedures (perineal urethrostomy, urethrotomy, tube cystostomy) and their success rates.
  • Evaluation of factors such as animal species, age, castration status, and pre-existing conditions.

Main Results:

  • Eight of ten animals underwent surgery, with varying outcomes.
  • Perineal urethrostomy and tube cystostomy were employed, with tube cystostomy resulting in full recovery without further intervention.
  • Revision surgeries were often required, particularly after initial urethrotomy or perineal urethrostomy.
  • Hyperkalemia and anemia were associated with poorer outcomes.

Conclusions:

  • Surgical management of urolithiasis in zoo animals is complex, with outcomes dependent on the chosen procedure and potential complications.
  • While some procedures like tube cystostomy showed promise, repeat surgeries were common.
  • Identifying and managing metabolic derangements like hyperkalemia is crucial for improving patient prognosis.