1. Belgian Reference Laboratory for VTEC/EHEC, Department of Microbiology and Infection Control, Universitair Ziekenhuis Brussel, Vrije Universiteit Brussel, Brussels, Belgium.
2. Department of Veterinary Public Health and Food Safety, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
3. Department of Epidemiology and Social Medicine, University of Antwerp, Antwerp, Belgium.