Abstract
Blood samples were collected from captive and free-ranging elk (Cervus canadensis), mule deer (Odocoileus hemionus), white-tailed deer, (Odocoileus virginianus), black-tailed deer (Odocoileus hemionus columbianus), pronghorn (Antilocapra americana), moose (Alces alces), and bighorn sheep (Ovis canadensis) for cultural evidence of Trypanosoma sp. infection. Eleven of 188 (12%) hunter-killed elk, 22 of 37 (59%) free-ranging elk, and 79 of 119 (66%) captive elk were culture positive in 1973-74. Parasitemia in adult captive elk showed seasonal variation. Other captive or live-trapped animals found positive included 16 mule deer, two white-tailed deer, and one black-tailed deer. No pronghorn, moose, or bighorn sheep were positive. A 0.25 ml inoculum of elk blood was sufficient to give positive culture results. Small sample size may have contributed to negative results from elk trapped in March 1973.
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