1. Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington 99164-7040, USA
2. Wyoming Game and Fish Wildlife Disease Laboratory, 1174 Snowy Range Road, Laramie, Wyoming 82070, USA
3. Montana Fish, Wildlife and Parks, 1400 South 19th Ave., Bozeman, Montana 59718, USA
4. Nevada Department of Wildlife, 1100 Valley Road, Reno, Nevada 89512, USA
5. Washington Department of Fish and Wildlife, 2315 North Discovery Place, Spokane Valley, Washington 99216-1566, USA