1. The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, UK
2. Moredun Research Institute, Edinburgh, UK
3. Scottish E. coli O157/STEC Reference Laboratory, Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh, UK
4. The Pirbright Research Institute, Pirbright, Woking, UK
5. Laboratoire de Biométrie et Biologie Evolutive, Université de Lyon, Villeurbanne, France
6. Epidemiology Research Unit, Scotland’s Rural College (SRUC), An Lòchran, Inverness Campus, Inverness, UK