SURVEY OF FREE-RANGING ELK FROM WYOMING AND MONTANA FOR SELECTED PATHOGENS

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Abstract
ABSTRAd:T: Fromnn Decemnnber 1991 thirough Jamnuar>' 1995, a disease survey was comndmncte(l on herds of free-ranging, hunter-killed elk (Cervus elaphus nelsoni) fromni tinree areas inn proximmnmt)' to Yellowstone National Park (YNP), Wyomnning (USA), after timberc'mmlosis caunsed liv M,,cobarterim,,n bovis was discovered in a captive herd of elk iii the area. Comnnplete or partial sets of' sptcinnnt'ns fromnn 289 elk collected between December 1991 anncl Jamnimary 1993 wend' exanmnimiedi hmistologicallv: no mycobacterial lesions were observed. Lesions of' tuberculosis were nnot dete.'cted inn tonsils or lymph nodes of the head from an additional 99 hmmmnter-killed, adumlt elk f'ronnm onne area (area 2) collected in Januamy 1995. Neither M. bovis nor M. 1)aratmlberc'mIlo.szswere isolated f'ronnn amnof the specinnens cultured. Antibodies to Brucella ahortus were detected inn sermnnn sanmiples f'ronmu 0%, 1%, and 1% of elk fromnn three areas sannphed (areas 1, 2, amnd 3), respectively. Brucella abortiis biovar 1 was isolated froni multiple tissues fromnn omne seropositive animal tronnn area .3. Lnnu' with morphology comnsistent with Diet yocaulus sp. were found in 12%, 14%, anid 0% of fecal speciumnenis tested fronn areas 1, 2, and 3, respectively. Pasteurella imiultocida and Actinomnt,ce.s pt/ogetu's were isolated fromn a lung with purulent bronchopneumnnonia and abscesses.

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