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1 July 2008 Nephrolithiasis and Pyelonephritis in Two West Indian Manatees (Trichechus manatus spp.)
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Abstract

Two West Indian manatees (Trichechus manatus spp.) were reported with severe emaciation. One animal was a Florida manatee from the Everglades; the other was an Antillean manatee from Cuba. On necropsy, both animals had nephrolithiasis, pyelonephritis, and moderate to severe renomegaly. Histopathology revealed multifocal to diffuse pyelonephritis, interstitial nephritis, and nephrocalcinosis. The stones were analyzed and consisted primarily of calcium carbonate. Serum chemistry values for the Florida animal revealed no renal abnormalities. The mechanism of calculus formation remains unclear in manatees. In horses, another hindgut fermenter, the most common urolith is also calcium carbonate. Urinalyses performed on manatees are very similar to those of horses (i.e., alkaline urine, low specific gravity, and calcium carbonate crystals). Formation of uroliths in manatees may have a pathogenesis similar to equine urolithiasis.

Keller, Moliner, Vásquez, Cruz, Bello, Costidis, Rommel, Calderwood Mays, and Gearhart: Nephrolithiasis and Pyelonephritis in Two West Indian Manatees (Trichechus manatus spp.)
Martha Keller, José L. Moliner, Grettys Vásquez, Danilo Cruz, Orestes Bello, Alex M. Costidis, Sentiel A. Rommel, Maron B. Calderwood Mays, and Scott Gearhart "Nephrolithiasis and Pyelonephritis in Two West Indian Manatees (Trichechus manatus spp.)," Journal of Wildlife Diseases 44(3), 707-711, (1 July 2008). https://doi.org/10.7589/0090-3558-44.3.707
Received: 6 February 2007; Published: 1 July 2008
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