1. University Clinic for Swine, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine, Veterinärplatz 1, 1210 Vienna, Austria
2. Austrian Agency for Health and Food Safety, 1090 Vienna, Austria
3. VETworks Strengberg, 3314 Strengberg, Austria
4. Institute of Microbiology, Department of Pathobiology, University of Veterinary Medicine, Veterinärplatz 1, 1210 Vienna, Austria