1. Department of Infectious Diseases and Neuroinfections, Medical University of Bialystok , Żurawia 14/ block E, 15-540 Bialystok , Poland
2. Medical University of Bialystok , Jana Kilińskiego 1, 15-089 Białystok , Poland
3. Department of Microbiology, Medical University of Bialystok , Waszyngtona 15a, 15-269 Bialystok , Poland