1. Department of Biology and Medical Parasitology; Pomeranian Medical University; Szczecin Poland
2. Department of Coal Chemistry and Environmental Sciences, Faculty of Energy and Fuels; AGH University of Science and Technology; Kraków Poland
3. Department of Animal Reproduction Biotechnology and Environmental Hygiene; West Pomeranian University of Technology; Szczecin Poland
4. Laboratory of Biology and Ecology of Parasites; West Pomeranian University of Technology; Szczecin Poland