1. Czech Collection of Microorganisms, Department of Experimental Biology, Masaryk University, Brno, Czech Republic
2. Section of Genetics and Molecular Biology, Department of Experimental Biology, Masaryk University, Brno, Czech Republic
3. Central European Institute of Technology, Masaryk University, Brno, Czech Republic
4. Institut für Mikrobiologie, Veterinärmedizinische Universität Wien, Veterinärplatz 1, A-1210 Wien, Austria