1. Department of Infection Diseases and Preventive Medicine Veterinary Research Institute Brno Czech Republic
2. Department of Experimental Biology Faculty of Science Masaryk University Brno Czech Republic
3. Faculty of Fisheries and Protection of Waters South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses University of South Bohemia in Ceske Budejovice Vodňany Czech Republic