IZABELA WAŚKO*, WALERIA HRYNIEWICZ and ANNA SKOCZYŃSKA National Reference Centre for Bacterial Meningitis, Department of Epidemiology and Clinical Microbiology, National Medicines Institute, Warsaw, Poland *Corresponding author: I. Waśko, National Reference Centre for Bacterial Meningitis, Department of Epidemiology and Clinical Microbiology, National Medicines Institute,...