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.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, ...201121719845
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