1 NIHR HPRU in Gastrointestinal Infections, University of Liverpool, Liverpool, UK; Department of Clinical Infection, Microbiology and Immunology, Institute for Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK.
2 Brighton and Sussex Medical School, Brighton, UK; University Hospitals Sussex National Health Service University hospitals Sussex NHS Foundation Trust, Brighton, UK.
3 UK Health Security Agency, London, UK.
4 NIHR HPRU in Gastrointestinal Infections, University of Liverpool, Liverpool, UK; UK Health Security Agency, London, UK.
5 NIHR HPRU in Gastrointestinal Infections, University of Liverpool, Liverpool, UK; Department of Genetics, University of Cambridge, Cambridge CB23EH, UK. Electronic address: [email protected].