1. Department of Parasitology and Invasive Diseases, National Veterinary Research Institute, 24-100 Pulawy, Poland
2. Department of Virology, National Veterinary Research Institute, 24-100 Pulawy, Poland
3. Department of Pathology, National Veterinary Research Institute, 24-100 Pulawy, Poland
4. Department of Pharmacology and Toxicology, National Veterinary Research Institute, 24-100 Pulawy, Poland