Nutrition of tortoises and other reptiles (Merck): calcium:phosphorus, vitamin D3, UVB
Source: Merck Veterinary Manual (merckvetmanual.com), a copyrighted veterinary reference. Per COPYRIGHT_POLICY §3, the points below are paraphrased derived fact summaries: numerical values and proper nouns are preserved from the source, but sentences are rewritten and not quoted verbatim.
Claims
- *[Paraphrased derived summary — non-Open-Access source.]* Radiographs often show mineralized or radiolucent tophi in affected organs and joints.
- *[Paraphrased derived summary — non-Open-Access source.]* Primary visceral gout is urate microcrystal deposition in organs resulting from chronic hyperuricemia, generally driven by excess dietary protein.
- *[Paraphrased derived summary — non-Open-Access source.]* Treatment of primary visceral gout centers on correcting the diet.
- *[Paraphrased derived summary — non-Open-Access source.]* Among reptile metabolic bone diseases, secondary nutritional hyperparathyroidism is the most common seen in practice.
- *[Paraphrased derived summary — non-Open-Access source.]* It is caused by poor diet (low calcium-to-phosphorus ratio, vitamin D3 deficiency) or poor husbandry (insufficient UVB light, inadequate heat).
- *[Paraphrased derived summary — non-Open-Access source.]* Affected animals are typically fast-growing herbivorous and insectivorous lizards and turtles/tortoises (chelonians).
- *[Paraphrased derived summary — non-Open-Access source.]* Late-stage findings include hyperphosphatemia and low total and ionized calcium.
- *[Paraphrased derived summary — non-Open-Access source.]* Critical cases need fluids, nutritional support, parenteral calcium if hypocalcemic, and phosphate binders if hyperphosphatemic.
- *[Paraphrased derived summary — non-Open-Access source.]* Correcting diet and husbandry is the foundation of successful treatment, with a good prognosis especially if the animal is still eating.
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License & attribution
Source: Merck Veterinary Manual (merckvetmanual.com) is a copyrighted veterinary reference and is not openly licensed. Per COPYRIGHT_POLICY §3, every claim above is a paraphrased derived fact summary (numbers and proper nouns preserved, sentences rewritten), not a verbatim quotation.
- https://www.merckvetmanual.com/exotic-and-laboratory-animals/reptiles/nutritional-metabolic-and-endocrine-diseases-of-reptiles