1. Institute of Zoology, Zoological Society of London, Regent's Park, London, NW1 4RY, UK
2. IDEXX Laboratories Limited, Grange House, Sandbeck Way, Wetherby, West Yorkshire, LS22 7DN, UK
3. Animal and Plant Health Agency (APHA), APHA Weybridge, New Haw, Addlestone, Surrey KT15 3NB, UK
4. Gastrointestinal Bacteria Reference Unit, Public Health England, London, NW9 5EQ, UK