Novel peeling skin condition in neonatal Pacific walruses, Saint Lawrence Island, Alaska, USA.

Autor:	Stimmelmayr R; North Slope Borough, Department of Wildlife Management, Utqiagvik, AK.; Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, AK, USA., Rotstein D; Marine Mammal Pathology Services, Olney, MD, USA., Sanchez S; Athens Veterinary Diagnostic Laboratory, Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, Athens, GA, USA., Baird A; Department of Natural Sciences, University of Houston-Downtown, Houston, TX, USA., Sheffield G; Alaska Sea Grant-Marine Advisory Program, University of Alaska Fairbanks, Nome, AK, USA., Snyder JA; Wildlife and Sport Fish Restoration Program, U.S. Fish and Wildlife Service, Anchorage, AK, USA.
Jazyk:	angličtina
Zdroj:	Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc [J Vet Diagn Invest] 2023 Nov; Vol. 35 (6), pp. 761-765. Date of Electronic Publication: 2023 Sep 13.
DOI:	10.1177/10406387231200577
Abstrakt:	We describe here a novel peeling skin condition (PSC) in 2 neonatal Pacific walruses ( Odobenus rosmarus subsp. divergens ). Macroscopically, calves had various degrees of peeling skin exacerbated by mechanical trauma. Lesions occurred in areas subject to friction: ventrum, fore- and hindflippers, and associated joints. Histopathologic features included pseudocarcinomatous epithelial hyperplasia with orthokeratotic hyperkeratosis. Bacterial cocci were present within the stratum corneum. A few intraepidermal clefts were present. Inflammation, epidermolysis, and vasculopathies were not observed. PCR assays were negative for vesivirus and for Staphylococcus aureus exfoliative and toxic shock syndrome toxins. Tissue samples were cultured and bacteria isolated and identified by MALDI-TOF MS as Carnobacterium maltaromaticum , Psychrobacter phenylpyruvicus , Globicatella sanguinis , Streptococcus phocae , Pseudomonas spp., Rahnella aquatilis , and Escherichia coli . Given the young age of the calves and their clinical presentation, congenital ichthyosis was suspected. No genetic differences were detected for sequenced portions of keratin genes (keratin gene K10 ) between diseased and normal walrus skin. This rare PSC in neonatal Pacific walruses is recognized as novel by indigenous Alaskan marine mammal hunters of the Bering Strait region. A comprehensive diagnostic work-up of future case materials is needed to characterize the underlying biochemical defect(s). Competing Interests: Declaration of conflicting interestsThe authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article. The findings and conclusions of the authors are their own and do not necessarily represent the views of the U.S. Fish and Wildlife Service.
Databáze:	MEDLINE
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