1. Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, Canada.
2. National Microbiology Laboratory, Public Health Agency of Canada, Saint Hyacinthe, Canada.
3. National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, Canada.
4. Office of the Chief Science Officer, Public Health Agency of Canada, Ottawa, Canada.
5. Department of Population Medicine, Ontario Veterinary College, University of Guelph, Guelph, Canada.