BEATA MAZIŃSKA* and WALERIA HRYNIEWICZ Department of Epidemiology and Clinical Microbiology, National Medicines Institute, Warsaw, Poland *Corresponding author: B. Mazińska, National Medicines Institute, Department of Epidemiology and Clinical Microbiology, Warsaw, Poland; e-mail: sekret@cls.edu.pl. Submitted 15 May 2017, revised and accepted 23 May 2017 DOI: Pol. J. Micro...