1. Faculty of Veterinary Medicine; University of Thessaly; Karditsa 43100 Box 199 Greece
2. Laboratory Testing Division; Veterinary Laboratories Agency - Weybridge; Woodham Lane, New Haw, Addlestone Surrey KT15 3NB
3. Department of Bacterial Diseases; Veterinary Laboratories Agency - Weybridge; Woodham Lane, New Haw, Addlestone Surrey KT15 3NB