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High-Throughput, Multi-Image Cryohistology of Mineralized Tissues

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Soft Tissue Mineralization in Captive 2-Toed Sloths.

S Han¹, M M Garner²

¹Colorado State University, College of Veterinary Medicine and Biomedical Sciences, Diagnostic Medicine Center, Fort Collins, CO, USA Sushan.Han@Colostate.edu.

Veterinary Pathology

|September 4, 2015

Summary

This summary is machine-generated.

Soft tissue mineralization is common in captive two-toed sloths, affecting arteries, kidneys, and lungs. Renal disease and potential nutritional imbalances may contribute to this condition in sloths.

Keywords:

Choloepus chronic kidney disease gastric mineralization hypercalcemia renal disease sloth soft tissue mineralization vascular mineralization

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Area of Science:

Veterinary Pathology
Comparative Pathology

Background:

Soft tissue mineralization is a pathological process observed in various species.
Two-toed sloths (Choloepus didactylus and Choloepus hoffmanni) are unique mammals with limited documented health studies.
Understanding mineralization in captive wildlife is crucial for welfare and conservation.

Purpose of the Study:

To investigate the prevalence and characteristics of soft tissue mineralization in captive two-toed sloths.
To identify potential underlying causes, including renal disease and nutritional factors.
To correlate mineralization with other pathological findings such as cardiac disease.

Main Methods:

Necropsy and histological examination of 19 captive two-toed sloths of varying ages.
Assessment of mineralization in arteries, visceral organs (gastric mucosa, kidneys, lungs), and cardiac tissues.
Evaluation of renal and cardiac pathology to determine potential contributing factors.

Main Results:

Soft tissue mineralization was diagnosed in all 19 sloths, with arterial mineralization (arteriosclerosis) in 11.
Visceral mineralization commonly affected gastric mucosa and kidneys (17/19), and lungs (8/19).
Moderate to severe renal disease was present in 11 adult sloths, while 5 sloths showed severe mineralization with normal or mildly affected kidneys, suggesting other causes.

Conclusions:

Renal disease is a significant contributor to soft tissue mineralization in adult sloths.
Other factors, including nutritional imbalances (calcium, phosphorus, vitamin D), may also play a role, particularly in cases with normal renal histology.
Degenerative cardiac disease was common and potentially exacerbated by hypertension associated with arteriosclerosis.