1. Enter-net Hub, Health Protection Agency, Department of Gastrointestinal Infections, Centre for Infections, London, United Kingdom.
2. Salmonella Zentrale, AGES/Med Graz, Graz, Austria.
3. Unit of Gastrointestinal Infections, Statens Seruminstitut, Copenhagen, Denmark.
4. Robert Koch-institut, Berich Werningerode, Werningerode/Harz, Germany.
5. University College Hospital, Galway, Ireland.
6. Istituto Superiore di Sanita, Laboratory of Medical Bacteriology & Mycology, Rome, Italy.
7. Laboratoire National de Santé, Luxembourg, Luxembourg.
8. National Institute for Public Health and the Environment, Department of Infectious Disease Epidemiology, Bilthoven, the Netherlands.
9. Scottish Salmonella Reference Laboratory, Department of Bacteriology, Stobhill Hospital, Glasgow, Scotland.
10. Instituto de Salud Carlos III, Centro Nacional de Microbiologia, Sección de Enterobacterias, Majadahonda, Spain.