{"topic_id":"exotic_nutrition_tortoise","category":"exotic-pet-nutrition","context":"---\ntopic_id: exotic_nutrition_tortoise\ncategory: exotic-pet-nutrition\ntitle: \"Nutrition of tortoises and other reptiles (Merck): calcium:phosphorus, vitamin D3, UVB\"\nlang: en\nsource: \"First-hand professional veterinary reference, saved to source_file; paraphrased derived fact summary per COPYRIGHT_POLICY §3. Deepened 2026-08-01.\"\nsource_file: pdf-raw/merck/reptiles_nutrimet.txt\ndate_parsed: 2026-08-01\ntokens_estimated: 407\nverification:\n  method: paraphrase\n  claims: 9\n  passed: 9\n  date: 2026-08-01\nrecovered: false\npath: exotic-pet-nutrition/exotic_nutrition_tortoise/01_exotic_nutrition_tortoise.md\nsource_document: \"Merck Veterinary Manual\"\ncitation:\n  authority: \"Merck Veterinary Manual\"\n  title: \"Nutrition of tortoises and other reptiles (Merck): calcium:phosphorus, vitamin D3, UVB\"\n  url: \"https://www.merckvetmanual.com/exotic-and-laboratory-animals/reptiles/nutritional-metabolic-and-endocrine-diseases-of-reptiles\"\n  retrieved: \"2026-08-01\"\n  ref: \"\"\n  doc_type: \"professional veterinary reference\"\n  needs_review: false\nlicense: paraphrase\ncopyright_note: \"Source Merck Veterinary Manual (merckvetmanual.com) is a copyrighted veterinary reference and not openly licensed; per COPYRIGHT_POLICY §3 all claims are paraphrased derived fact summaries (numbers and proper nouns preserved, sentences rewritten), not verbatim quotations.\"\nauthority_tier: T3\nauthority_tier_basis: \"T3:vet-ref\"\nauthority_tier_date: 2026-08-04\n---\n\n# Nutrition of tortoises and other reptiles (Merck): calcium:phosphorus, vitamin D3, UVB\nSource: 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.\n\n## Claims\n\n- *[Paraphrased derived summary — non-Open-Access source.]* Radiographs often show mineralized or radiolucent tophi in affected organs and joints.\n- *[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.\n- *[Paraphrased derived summary — non-Open-Access source.]* Treatment of primary visceral gout centers on correcting the diet.\n- *[Paraphrased derived summary — non-Open-Access source.]* Among reptile metabolic bone diseases, secondary nutritional hyperparathyroidism is the most common seen in practice.\n- *[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).\n- *[Paraphrased derived summary — non-Open-Access source.]* Affected animals are typically fast-growing herbivorous and insectivorous lizards and turtles/tortoises (chelonians).\n- *[Paraphrased derived summary — non-Open-Access source.]* Late-stage findings include hyperphosphatemia and low total and ionized calcium.\n- *[Paraphrased derived summary — non-Open-Access source.]* Critical cases need fluids, nutritional support, parenteral calcium if hypocalcemic, and phosphate binders if hyperphosphatemic.\n- *[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.\n---\n## License & attribution\n\nSource: 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.\n\n- https://www.merckvetmanual.com/exotic-and-laboratory-animals/reptiles/nutritional-metabolic-and-endocrine-diseases-of-reptiles","sources":["exotic-pet-nutrition — Nutrition of tortoises and other reptiles (Merck): calcium:phosphorus, vitamin D3, UVB (retrieved 2026-08-01)"],"source":{"authority":"exotic-pet-nutrition","title":"Nutrition of tortoises and other reptiles (Merck): calcium:phosphorus, vitamin D3, UVB","url":"https://www.merckvetmanual.com/exotic-and-laboratory-animals/reptiles/nutritional-metabolic-and-endocrine-diseases-of-reptiles","retrieved":"2026-08-01","ref":"","doc_type":"official PDF","source_document":"Merck Veterinary Manual","verification_file":"pdf-raw/merck/reptiles_nutrimet.txt"},"source_document":"Merck Veterinary Manual","source_file":"pdf-raw/merck/reptiles_nutrimet.txt","trust":{"authority_tier":"T3","fidelity":"paraphrase","license":"paraphrase","display_grade":"B"},"tokens_estimated":110,"generated_at":null,"tip":"Use /api/v1/topics to discover more topics. /api/v1/nutrient for precise single-point queries. /api/v1/cross_compare for 2-3 standard comparisons."}