1. Hessian State Laboratory, Department of Veterinary Medicine, Giessen, Germany
2. Institute of Laboratory Medicine and Pathobiochemistry, Molecular Diagnostics, Philipps University Marburg, Marburg, Germany
3. Institute of Medical Microbiology, Justus Liebig University Giessen, Giessen, Germany
4. Medical Clinic II, Justus Liebig University Giessen, Gissen, Germany
5. Central Facility for Microscopy, Helmholtz Centre for Infection Research, Braunschweig, Germany
6. Institute for Microbiology, University of Veterinary Medicine Hannover, Hannover, Germany
7. Institute for Bacteriology and Mycology, Centre of Infectious Diseases, College of Veterinary Medicine, University Leipzig, Leipzig, Germany