YERSINIOSIS IN FREE-RANGING MUSKOXEN ON BANKS ISLAND, NORTHWEST TERRITORIES, CANADA
Abstract
Sixty-seven muskox (Ovibos moschatus) carcasses, 53 skeletal remains and two sick muskoxen were seen during an aerial survey of the Thomsen River region, northern Banks Island, Northwest Territories, Canada in late July 1986. Complete necropsies were performed on 29 muskoxen estimated to have died within the previous 3 to 5 days. Twenty were diagnosed with acute yersiniosis due to Yersinia pseudotuberculosis serotype 1B and were in excellent body condition. A diagnosis could not be made on seven animals due to marked autolysis; however, these muskoxen also were in excellent body condition. The remaining two were aged, emaciated muskoxen. This report describes the first occurrence of yersiniosis in free-ranging muskoxen and the first documentation of large scale mortality due to this disease in a free-ranging population of wild ungulates.
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Trace mineral deficiencies in wild ruminants predispose them to a range of subclinical ailments including poor reproductive performance, immunosuppression, and anemia.
“Trace mineral deficiencies in wild ruminants predispose them to a range of subclinical ailments including poor reproductive performance, immunosuppression, and anemia (Blake et al. 1991; Afema et al. 2017)”
From Muskox status, recent variation, and uncertain future (2020) · cites this paper as Blake et al. 1991
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“However, when we aligned the sequence using BLAST to Y. pseudotuberculosis , the identity match returned 98% suggesting a high similarity to the bacteria that caused the death of 20 muskoxen on Banks Island in 1986 (Blake et al., 1991).”
Outbreaks of Yersiniosis Caused by Yersinia Pseudotuberculosis in Farmed Cervids
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“Yersinia pseudotuberculosis, a member of the family Enterobacteriaceae, infects a variety of avian, mammalian, and reptilian species.(3,5,7,13,14,16) The organism is ubiquitous and carried asymptomatically by a range of animal species, such as wild birds and rodents.”
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“Note that while bleeding can be caused by skull fracture, it may also be caused by injuries from horn impalement or parasitic infection (yersi-nosis), common in muskoxen (Blake et al., 1991).”
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“Several outbreaks of yersiniosis have been reported in North American deer ranches, wildlife parks, and in free-ranging wildlife (Blake et al 1991, Sanford 1995, Welsh et al 1992).”
BackgroundYersiniosis in muskoxen on Banks Island, N.W.T., 1987-1990
McLean, B. D., Fraser, P., & Blake, J. E. (1993) · Rangifer · doi:10.7557/2.13.1.1077 · Cited by 1 · see citing works
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“…& Forchhammer, 2008), overhunting (Lent, 1999; Bennike & Andreasen, 2005), increased predation pressure (Marquard-Pedersen, 1998), infectious diseases (Blake et al., 1991; Kutz et al., 2004; Kutz et al., 2015), and perhaps disturbance from mineral exploration activities (Aastrup & Mosbech, 2000).”
Background
- Authors
- Blake, J. E., McLean, B. D., & Gunn, A.
- Affiliations
- University of Alaska Fairbanks (US)
- Government of Northwest Territories (CA)
- Venue
- Journal of Wildlife Diseases
- Publisher
- Wildlife Disease Association
- Published
- 1991-10
- Volume
- 27
- Issue
- 4
- Pages
- 527-533
- ISSN
- 0090-3558 (ISSN-L)
- OpenAlex
- W2079731256
- Cited by
- 21
- References
- 0
- Citations by year
- 2025: 1 · 2024: 1 · 2022: 1 · 2021: 1 · 2019: 4 · 2015: 1
- FWCI
- 0.21
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Wildlife Diseases (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Yersinia bacterium, plague, ectoparasites research
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Zoonotic diseases and public health
- Life Sciences › Immunology and Microbiology › Microbiology › Microbial infections and disease research
- Keywords
- yersiniosis, Ovibos moschatus, free-ranging wildlife, wildlife mortality, Banks Island, wild ungulates, autopsy findings
- MeSH terms
- Acute Disease, Animals, Artiodactyla, Cecum, Female, Jejunum, Liver, Lymph Nodes, Male, Yersinia pseudotuberculosis Infections, Northwest Territories
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