1. Animal Health and Veterinary Laboratory Agency, Royal Veterinary College, Hawkshead Lane, North Mymms, UK
2. AHVLA Lasswade, Pentlands Science Park, Bush Loan, Penicuik, UK
3. Public Health England, Gastrointestinal Bacteria Reference Unit, London, UK
4. AHVLA Winchester, Itchen Abbas, UK
5. Department of Bacteriology, AHVLA Weybridge, New Haw, Addlestone, UK
6. Larkmead Veterinary Group, Ilges Lane, Oxon, UK