1. Department of Pathology, Bacteriology and Poultry Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium
2. BCCM/LMG Bacteria Collection, Laboratory of Microbiology, Faculty of Sciences, Ghent University, K. L. Ledeganckstraat 35, B-9000 Gent, Belgium
3. Department of Clinical Chemistry, Microbiology and Immunology, Ghent University Hospital, Ghent University, De Pintelaan 185, B-9000 Gent, Belgium