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Volume 18, Number 3—March 2012


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 5

Bacteria detected in lung tissue from bighorn sheep with pneumonia, western United States, 2008–2010*

Bacterial species Clone sequences, no. (%) No. animals† No. populations‡
Fusobacterium spp. 112 (21.3) 8 5
Pasteurella multocida 67 (12.7) 5 4
Prevotella spp. 57 (10.8) 9 5
Mycoplasma ovipneumoniae 52 (9.9) 5 4
Bibersteinia trehalosi 46 (8.7) 4 3
Clostridium spp. 42 (8.0) 10 7
Bacteroides spp. 16 (3.0) 7 5
Acinetobacter spp. 14 (2.7) 3 3
Streptococcus spp. 13 (2.5) 1 1
Pseudomonas spp. 7 (1.3) 2 2
Eubacterium spp. 6 (1.1) 4 3
Pasteurellaceae spp. 6 (1.1) 2 2
Ruminococcus spp. 6 (1.1) 3 3

*rDNA sequence analysis was used. Only species identifications comprising >1% of sequences are reported.
†Number of animals in which the bacterial species was detected, total 16 animals (2 animals each from 8 populations).
‡Number of populations in which the bacterial species was detected, total 8 populations.

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