Tomislav Mestrovic1, Marijana Neuberg2. 1. Clinical Microbiology and Parasitology Unit, Polyclinic "Dr. Zora Profozic", Zagreb, Croatia Department of Biomedical Sciences, University Centre Varazdin, University North, Varazdin, Croatia. 2. Department of Biomedical Sciences, University Centre Varazdin, University North, Varazdin, Croatia.