1. Molecular Bacteriology Group, Institute of Comparative Medicine, Department of Veterinary Pathology, Glasgow University Veterinary School, Bearsden Road, Glasgow G61 1QH
2. Department of Food and Environmental Safety, Veterinary Laboratories Agency (Weybridge), Addlestone, Surrey KT15 3NB, United Kingdom
3. Institute of Molecular Biology, Centre of Excellence for Molecular Medicine, Slovak Academy of Science, 845 51 Bratislava, Slovak Republic