1. Clinic for Swine; Department for Farm Animals and Herd Management
2. Institute for Veterinary Disease Control; Austrian Agency for Health and Food Safety; Robert Koch-Gasse 17 A-2340 Mödling Austria
3. Institute of Pathology and Forensic Veterinary Medicine; Department of Pathobiology; University of Veterinary Medicine; Veterinärplatz 1 A-1210 Vienna Austria