1. Public Health Agency of Canada, Centre for Food-borne, Environmental & Zoonotic Infectious Diseases, Food-borne Disease and Antimicrobial Resistance Surveillance Division, Guelph, Canada.
2. Public Health Agency of Canada, National Microbiology Laboratory, Division of Enteric Diseases, Winnipeg, Canada.
3. Public Health Agency of Canada, Centre for Food-borne, Environmental & Zoonotic Infectious Diseases, Outbreak Management Division, Ottawa, Canada.