1. Institute of Bacteriology and Mycology, Centre for Infectious Diseases, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
2. Department for Horses, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
3. Institute of Immunology, Centre for Infectious Diseases, Faculty of Veterinary Medicine, University of Leipzig, Leipzig, Germany
4. German National Reference Center for Streptococci, Institute of Medical Microbiology, University Hospital RWTH Aachen, Aachen, Germany
5. Division of Infection Medicine, Lund University, Lund, Sweden
6. Animal Health Trust, New Market, Suffolk, United Kingdom
7. Department of Physiological Chemistry, University of Veterinary Medicine Hannover, Hannover, Germany
8. Germany and Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, Hannover, Germany