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Integrative and Comparative Biology 2004 44(2):109-118; doi:10.1093/icb/44.2.109
© 2004 by The Society for Integrative and Comparative Biology
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"Emerging" Parasitic Infections in Arctic Ungulates1

Susan J. Kutz2,1, Eric P. Hoberg2, John Nagy3, Lydden Polley1 and Brett Elkin4
1 Department of Veterinary Microbiology, Western College of Veterinary Medicine, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4, Canada
2 U.S. Department of Agriculture, Agricultural Research Service, U.S. National Parasite Collection, and Animal Parasitic Diseases Laboratory, BARC East 1180, 10300 Baltimore Avenue, Beltsville, Maryland 20715
3 {ddagger}Department of Resources, Wildlife and Economic Development, Government of the Northwest Territories, Bag 1, Inuvik, Northwest Territories X0E 0T0, Canada
4 Department of Resources, Wildlife and Economic Development, Government of the Northwest Territories, 600, 5102-50th Ave, Yellowknife, Northwest Territories X1A 3S8, Canada

Important drivers for emergence of infectious disease in wildlife include changes in the environment, shrinking habitats or concentration of wildlife, and movement of people, animals, pathogens, or vectors. In this paper we present three case-studies of emerging parasitic infections and diseases in ungulates in the Canadian north. First we discuss climate warming as an important driver for the emergence of disease associated with Umingmakstrongylus pallikuukensis, a nematode lungworm of muskoxen. Then we examine how Protostrongylus stilesi, the sheep lungworm, emerged (or re-emerged) in muskoxen after re-introduction of this host into its historical range made it sympatric with Dall's sheep. Finally, we consider Teladorsagia boreoarcticus, a newly described and common abomasal nematode of muskoxen that is emerging as a disease-causing parasite and may be an important regulator for muskox populations on Banks Island, Northwest Territories. These and other arctic host-parasite systems are exquisitely tuned and constrained by a harsh and highly seasonal environment. The dynamics of these systems will be impacted by climate change and other ecological disruptions. Baseline knowledge of parasite biodiversity and parasite and host ecology, together with predictive models and long-term monitoring programs, are essential for anticipating and detecting altered patterns of host range, geographic distribution, and the emergence of parasitic infections and diseases.


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