Vitamin D Toxicosis in a Blue-Tongued Skink (Tiliqua scincoides) Presented with Epistaxis and Tongue Discoloration

Vergneau‐Grosset, Claire; Carmel, Éric Norman; Raulic, Juliette; Tucoulet, Julie; Summa, Noémie; Langlois, Isabelle; Benoit, Jean-Marc

doi:10.5818/19-04-193.2

Cited by 2 publications

(1 citation statement)

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“…Confirmed cases of toxicity from oral vitamin D supplementation in reptiles are rare, but clinical features include high serum 25(OH)D 3 , hypercalcaemia and metastatic calcification (Vergneau‐Grosset et al, 2020). Cases may go undiagnosed owing to very nonspecific symptoms of malaise such as lethargy and anorexia, or diagnosed as renal failure which is common in captive reptiles and has many other causes besides prolonged hypercalcemia.…”

Section: Discussionmentioning

confidence: 99%

UVB‐emitting LEDs for reptile lighting: Identifying the risks of nonsolar UV spectra

Wunderlich,

Griffiths,

Baines

2023

Zoo Biology

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UVB lamps are used to provide reptiles housed indoors with the UV radiation necessary to synthesize vitamin D3 in their skin. Since 2019, UVB‐LED lamps have been on sale for use in reptile husbandry. We performed spectral analysis and mapped the UV irradiance for 18 of these lamps. The positive benefits of UVB‐LED lamps over traditional products include greater energy efficiency, freedom from mercury and easy installation without external ballasts. However, the spectra of all the UVB‐LED lamps tested had little similarity to the solar UV spectrum. Some lamps emitted short‐wavelength, non‐terrestrial, radiation known to cause acute photo‐kerato‐conjunctivitis; we report one case. All lamps were lacking significant output in the range 315–335 nm, essential for natural self‐regulation of cutaneous vitamin D3 synthesis, preventing overproduction. We describe a possible risk of serious hypervitaminosis D based on our spectral analysis. We call for long‐term animal studies to assess this risk, in which the reptiles under these lamps are exposed to species‐appropriate UV index levels according to their Ferguson Zone allocation and serum levels of vitamin D3 and 25(OH)D3 monitored. Spectral modifications of the lamps to make the spectrum more like sunlight may be an essential way of mitigating this risk.

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Section: Discussionmentioning

confidence: 99%