1. Department of Microbiology and Infectious Diseases, Faculty of Veterinary Sciences, Szent István University, H-1143 Budapest, Hungary
2. Clinical Virology Group, Institute of Virology
3. Department of Microbiology and Electron Microscopy, Agricultural Inspection Service and Research Centre Vienna, Austrian Agency for Health and Food Safety and Federal Office for Food Safety, A-1226 Vienna, Austria
4. Department of Infectious Diseases, Microbiology & Parasitology, Faculty of Veterinary Medicine, Warsaw Agricultural University, PL-03-849 Warsaw, Poland
5. Department of Bee Pathology, CVUA-Animal Health, D-79108 Freiburg, Germany
6. Institute of Hydrobiology, Ichthyology and Apidology, University of Veterinary Medicine, A-1210 Vienna
7. Department of Medical Microbiology, Faculty of Medicine and Health Sciences, United Arab Emirates University, Al Ain, United Arab Emirates