1. Laboratory of Biomedical Microbiology and Immunology, University of Veterinary Medicine and Pharmacy in Kosice, Kosice, Slovak Republic.
2. Department of Microbiology, Faculty of Medicine and Dentistry, Palacky University, Olomouc, Czech Republic.
3. Laboratory of Growth Regulators, Institute of Experimental Botany AS CR, Palacky University, Olomouc, Czech Republic.