1. Department of Chemistry, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000Niš, Serbia
2. Department of Physiology, Faculty of Medicine, University of Niš, Bulevar Zorana D̵ind̵ića 81, 18000Niš, Serbia
3. Department of Biology and Ecology, Faculty of Sciences and Mathematics, University of Niš, Višegradska 33, 18000Niš, Serbia
4. National Reference Laboratory for Toxoplasmosis, Centre for Parasitic Zoonoses, Institute for Medical Research, University of Belgrade, Dr. Subotića 4, 11129Belgrade, Serbia
5. Department of Chemistry, Biochemistry and Environmental Protection, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 3, 21000Novi Sad, Serbia