1. Institute for Bacteriology and Mycology, Centre for Infectious Diseases, Veterinary Faculty, University of Leipzig, Leipzig, Germany
2. Institute of Immunology, Centre for Infectious Diseases, Veterinary Faculty, University of Leipzig, Leipzig, Germany
3. Department of Physiological Chemistry and Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Hannover, Germany
4. Central Facility for Microscopy, Helmholtz Centre for Infection Research, Braunschweig, Germany
5. Department of Neuropathology, University Medical Center Göttingen, Georg-August-University Göttingen, Göttingen, Germany
6. Department of Geriatrics, Evangelisches Krankenhaus Göttingen-Weende, Göttingen, Germany
7. Institute for Microbiology, Centre for Infection Medicine, University of Veterinary Medicine Hannover, Hanover, Germany
8. Institute of Immunology, University of Heidelberg, Heidelberg, Germany
9. Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany