1. 1 Department of Preclinical Sciences and Infectious Diseases, Faculty of Veterinary Medicine and Animal Science, Poznań University of Life Sciences , Poznań , Poland
2. 2 Department of Fisheries Resources, National Marine Fisheries Research Institute , Gdynia , Poland
3. 3 Department of Fish Diseases, National Veterinary Research Institute , Puławy , Poland
4. 4 Department of Parasitology and Invasive Disease, National Veterinary Research Institute , Puławy , Poland