1. Wellcome Trust Sanger Institute, Wellcome Trust Genome Campus, Hinxton CB10 1SA, UK.
2. Royal Veterinary College, North Mymms, Hatfield AL9 7TA, UK.
3. Department of Veterinary Medicine, University of Cambridge, Cambridge CB3 0ES, UK.
4. Scottish Salmonella Shigella and Clostridium difficile Reference Laboratory, Stobhill Hospital, Glasgow G21 3UW, UK.
5. National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, R3E 3R2, Canada.
6. Animal Health and Veterinary Laboratories Agency, Weybridge, KT15 3NB, UK.
7. Gastrointestinal Bacteria Reference Unit, Public Health England, Colindale, London NW9 5EQ, UK.
8. Pathogen Genomics Center, National Institute of Infectious Diseases, Tokyo 162-8640, Japan.
9. Bacterial and Parasitic Disease Research Division, National Institute of Animal Health, Ibaraki 305-0856, Japan.
10. Department of Bacteriology I, National Institute of Infectious Diseases, Tokyo 162-8640, Japan.
11. Departments of Biomathematics and Human Genetics, David Geffen School of Medicine at UCLA, and Department of Biostatistics, UCLA Fielding School of Public Health, University of California, Los Angeles, CA 90095, USA.
12. Department of Microbiology and Immunology, Rega Institute, KU Leuven, 3000 Leuven, Belgium.
13. Boyd Orr Centre for Population and Ecosystem Health, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G12 8QQ, UK.