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Prevalence of Trichinella spp. in Black Bears, Grizzly Bears, and Wolves in the Dehcho Region, Northwest Territories, Canada, Including the First Report of T. nativa in a Grizzly Bear from Canada.
MedLine Citation:
PMID:  21719845     Owner:  NLM     Status:  In-Data-Review    
Samples of muscle from 120 black bears (Ursus americanus), 11 grizzly bears (Ursus arctos), and 27 wolves (Canis lupus) collected in the Dehcho Region of the Northwest Territories from 2001 to 2010 were examined for the presence of Trichinella spp. larvae using a pepsin-HCl digestion assay. Trichinella spp. larvae were found in eight of 11 (73%) grizzly bears, 14 of 27 (52%) wolves, and seven of 120 (5.8%) black bears. The average age of positive grizzly bears, black bears, and wolves was 13.5, 9.9, and approximately 4 yr, respectively. Larvae from 11 wolves, six black bears, and seven grizzly bears were genotyped. Six wolves were infected with T. nativa and five with Trichinella T6, four black bears were infected with T. nativa and two with Trichinella T6, and all seven grizzly bears were infected with Trichinella T6 and one of them had a coinfection with T. nativa. This is the first report of T. nativa in a grizzly bear from Canada. Bears have been linked to trichinellosis outbreaks in humans in Canada, and black bears are a subsistence food source for residents of the Dehcho region. In order to assess food safety risk it is important to monitor the prevalence of Trichinella spp. in both species of bear and their cohabiting mammalian food sources.
Nicholas C Larter; Lorry B Forbes; Brett T Elkin; Danny G Allaire
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of wildlife diseases     Volume:  47     ISSN:  1943-3700     ISO Abbreviation:  J. Wildl. Dis.     Publication Date:  2011 Jul 
Date Detail:
Created Date:  2011-07-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0244160     Medline TA:  J Wildl Dis     Country:  United States    
Other Details:
Languages:  eng     Pagination:  745-9     Citation Subset:  IM    
Government of the Northwest Territories, Department of Environment and Natural Resources, P.O. Box 240, Fort Simpson, Northwest Territories X0E 0N0, Canada.
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