Author Affiliations +
T. M. WILSON,1,2 J. R. LONG3
1Department of Pathology, Section of Zoonoses and Wildlife Diseases, Ontario Veterinary College, University of Guelph, Guelph, Ontario, Canada.
2This investigation was supported by an A.V.M.A. Foundation Award.
3Department of Veterinary Microbiology and Immunology, Ontario Veterinary College.