1. Institute of Vertebrate Biology, Academy of Sciences of the Czech Republic, Brno, Czech Republic
2. Bundeswehr Institute of Microbiology, D-80937 Munich, Germany
3. Czech Collection of Microorganisms, Masaryk University, Brno, Czech Republic
4. Friedrich Loeffler Institute of Bacterial Infections and Zoonoses, German Reference Center for Brucellosis, Jena, Germany.