1. NIHR HPRU in Gastrointestinal Infections at University of Liverpool, Liverpool L69 3BX, UK
2. Warwick Medical School, University of Warwick, Coventry, CV4 7AL, UK
3. National Infection Service, UK Health Security Agency, 61 Colindale Avenue, London, NW9 5AT, UK
4. Communicable Disease Surveillance Centre, Public Health Wales, Cardiff, UK
5. Public Health Laboratory, Health Service Executive, Cherry Orchard Hospital, Ballyfermot, Dublin, Ireland
6. Scottish E. coli O157/STEC Reference Laboratory, Royal Infirmary of Edinburgh, Edinburgh, EH16 4SA, UK
7. Public Health Scotland, Glasgow, G2 6QE, UK
8. Public Health and Primary Care, Trinity College Dublin, Dublin, Ireland