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Volume 18, Number 3—March 2012

Research

Causes of Pneumonia Epizootics among Bighorn Sheep, Western United States, 2008–2010

Thomas E. BesserComments to Author , Margaret A. Highland, Katherine Baker, E. Frances Cassirer, Neil J. Anderson, Jennifer M. Ramsey, Kristin Mansfield, Darren L. Bruning, Peregrine Wolff, Joshua B. Smith, and Jonathan A. Jenks
Author affiliations: Washington State University, Pullman, Washington, USA (T.E. Besser, M.A. Highland, K. Baker); Washington Animal Disease Diagnostic Laboratory, Pullman (T.E. Besser); US Department of Agriculture Agricultural Research Service, Pullman (M.A. Highland); Idaho Department of Fish and Game, Lewiston, Idaho, USA (E.F. Cassirer); Montana Fish, Wildlife and Parks, Bozeman, Montana, USA (N.J. Anderson, J.M. Ramsey); Washington Department of Fish and Wildlife, Spokane Valley, Washington, USA (K. Mansfield); US Department of Agriculture Animal and Plant Health Inspection Service, Olympia, Washington, USA (D.L. Bruning); Nevada Department of Wildlife, Reno, Nevada, USA (P. Wolff); South Dakota State University, Brookings, South Dakota, USA (J.B. Smith, J.A. Jenks)

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Table 4

Strain types identified in lung tissue from bighorn sheep, western United States, 2008–2010*

Population Pasteurellaceae (no. animals)† Mycoplasma ovipneumoniae (no. animals)‡
East Fork Bitterroot, MT Btre21, Mhae5, Pmul5 (1 each); Pmul24 (5) Movi3 (5)
Bonner, MT No isolate available Movi4 (6)
Lower Rock Creek. MT Btre1 (1); Pmul22 (3) Movi6 (3)
Anaconda, MT Pmul24 (5) Movi6 (5)
East Humboldt and Ruby Mountains, NV Btre7 (2); Btre8 (3) Movi5 (4)
Yakima Canyon, WA Btre8, Pmul 22 (1 each); Pmul20 (3); Btre9, 13 (5 each) Movi2 (7)
Spring Creek, SD Btre10, 11, 12, 17, 19 (1 each); Pmul20 (2) Movi7 (5)
Hells Canyon, OR and WA Btre 1, 2, 3, 4, 14, 15, 16 (1 each) Movi1 (4)
Quilomene, WA Mhae23 (1); Btre8 (2) None detected
Asotin Creek, WA No isolate available None detected

*MT, Montana; NV, Nevada; SD, South Dakota; WA, Washington; OR, Oregon.
†Pasteurellaceae cluster assignments based on apaI pulsed-field gel electrophoresis profiles with Dice coefficients clustered by unpaired pair group method with arithmetic means (threshold, 90% identity).
‡M. ovipneumoniae strain types identified by ribosomal 16S–23S intergenic spacer region DNA sequences.

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