1. University of Niš, Faculty of Medicine, Department of Microbiology and Immunology, Serbia; Public Health Institute Niš , Niš Serbia
2. Zoological Museum Hamburg, Leibniz Institute fort the Analysis of Biodiversity Change (LIB) and University Hamburg , Martin-Luther-King-Platz 3, 20146 Hamburg , Germany
3. University of Niš, Faculty of Medicine, Institute of Histology and Embriology , Niš Serbia