1. Laboratory for Foodborne Zoonoses, Public Health Agency of Canada, Faculté de Médecine Vétérinaire, Pavillon de Santé Publique Vétérinaire, Saint-Hyacinthe, Québec, Canada.
2. School of Engineering, University of Guelph, Guelph, Ontario, Canada.
3. Joint Institute for Food Safety and Applied Nutrition, University of Maryland, College Park, Maryland.
4. Laboratory for Foodborne Zoonoses, Public Health Agency of Canada, Guelph, Ontario, Canada.