1. Wildlife Epidemiology Laboratory, College of Veterinary Medicine at University of Illinois, Urbana-Champaign, 2001 S Lincoln Avenue, Urbana, Illinois 61802, USA
2. Department of Comparative, Diagnostic, and Population Medicine, College of Veterinary Medicine at University of Florida, 2015 SW 16th Avenue, Gainesville, Florida 32610, USA
3. Veterinary Diagnostic Laboratory, College of Veterinary Medicine at University of Illinois, Urbana-Champaign, 2001 S Lincoln Avenue, Urbana, Illinois 61802, USA
4. Illinois Natural History Survey, Prairie Research Institute, University of Illinois, 1820 S Oak Street, Champaign, Illinois 61820, USA