1. Department of Animal Protection, Welfare and Behaviour; University of Veterinary and Pharmaceutical Sciences Brno; Palackeho tr. 1946/1 Brno 612 42 Czech Republic
2. Department of Immunology; Veterinary Research Institute; Hudcova 70 Brno 621 00 Czech Republic
3. Department of Zoology, Fisheries, Hydrobiology and Apiculture; Mendel University in Brno; Zemedelska 1 Brno 613 00 Czech Republic