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Hypervitaminosis D in green iguanas
1Center for the Biology of Natural Systems, St. Louis Zoological Park, St. Louis, MO, USA.
Journal of the American Veterinary Medical Association
|March 15, 2012
Summary
Hypervitaminosis D in green iguanas resulted from excessive vitamin D, calcium, and phosphorus supplementation. This condition caused severe arterial calcification and kidney damage, highlighting risks in captive wild animal nutrition.
Area of Science:
- Veterinary Medicine
- Comparative Pathology
- Reptile Nutrition
Background:
- Captive wild animals, including reptiles like green iguanas, often receive dietary supplements to meet nutritional needs.
- Understanding the precise requirements for vitamins, minerals, and other nutrients is crucial for preventing toxicity.
Observation:
- Two green iguanas presented with clinical signs and pathological findings consistent with hypervitaminosis D.
- Gross and microscopic examination revealed significant lesions.
Findings:
- Massive deposition of calcium salts in the media of elastic arteries was observed.
- Terminal nephritis (kidney inflammation and damage) was a prominent finding.
- These lesions are characteristic of hypervitaminosis D.
Implications:
- Hypervitaminosis D is a serious condition that can occur with improper supplementation in captive reptiles.
- Veterinarians and keepers must be aware of the potential for toxicity when administering vitamin D, calcium, and phosphorus.
- This case underscores the importance of accurate nutritional assessment for captive wild animals to prevent adverse health outcomes.
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