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1 January 2010 Hypoaminoacidemia is not Associated with Ulcerative Lesions in Black Rhinoceroses, Diceros bicornis
Candice L. Dorsey, Patricia Dennis, Andrea J. Fascetti, Thomas Wood, Janine L. Brown
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Abstract

Ulcerative oral and skin lesions have become an issue of concern for the health of the managed black rhinoceros (rhino) (Diceros bicornis) populations. Lesions exhibited by the black rhino are clinically similar to those observed in other species with superficial necrolytic dermatitis (SND). One biochemical alteration in dogs with SND is severe hypoaminoacidemia, and nearly all cases are fatal. The objective of this study was to determine if black rhinos with analogous lesions exhibit a similar hypoaminoacidemia. Amino acid concentrations were measured in monthly plasma samples collected for 1 yr from black rhinos with (n  =  4) and without (n  =  34) lesions clinically consistent with SND. The rhinos with skin and/or oral lesions were zoo born males, ages 2, 6, 17, and 23 yr, from four different facilities. Three rhinos recovered from skin (n  =  2) and oral lesions (n  =  1). However, the one male with both skin and oral lesions died with the disease. None of the affected black rhinos exhibited a decrease in any of the amino acids evaluated or for total amino acid concentrations (P > 0.05). Based on the absence of hypoaminoacidemia and the comparatively low mortality rate in rhinos with lesions, it appears that this syndrome is not entirely consistent with SND observed in other species. These data will be useful for future assessments of rhino nutritional status and other potential metabolic diseases.

Candice L. Dorsey, Patricia Dennis, Andrea J. Fascetti, Thomas Wood, and Janine L. Brown "Hypoaminoacidemia is not Associated with Ulcerative Lesions in Black Rhinoceroses, Diceros bicornis," Journal of Zoo and Wildlife Medicine 41(1), 22-27, (1 January 2010). https://doi.org/10.1638/2008-0188.1
Received: 10 December 2008; Published: 1 January 2010
JOURNAL ARTICLE
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KEYWORDS
Amino acids
black rhinoceros
Diceros bicornis
hypoaminoacidemia
skin lesions
superficial necrolytic dermatitis
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