Abstract
1 Department of Veterinary Public Health and Food Safety, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
2 Institute of Environmental Science and Research, Christchurch Science Center, 27 Creyke Road, Ilam, PO Box 29 181, Christchurch 8004, New Zealand
3 Danish Institute of Food and Veterinary Research, Copenhagen, Denmark
4 Laboratory for Pharmaceutical Microbiology, Ghent University, Harelbekestraat 72, B-9000 Ghent, Belgium
5 Department of Biochemistry, Physiology and Microbiology, Faculty of Sciences, Ghent University, K. L. Ledeganckstraat 35, 9000 Ghent, Belgium