1. Department of Veterinary Population Medicine, Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Minnesota, 1333 Gortner Ave., St. Paul, Minnesota 55108, USA
2. Wildlife Health Program, Minnesota Department of Natural Resources, 5463C W Broadway, Forest Lake, Minnesota 55025, USA
3. Fond du Lac Resource Management Division 1720 Big Lake Road, Cloquet, Minnesota 55720, USA
4. Department of Veterinary Sciences, Veterinary Diagnostic Laboratory, College of Veterinary Medicine, University of Minnesota, 1971 Commonwealth Avenue, St. Paul, Minnesota 55108, USA