Objective. To study antimicrobial resistance of Haemophilus influenzae and its trends in different Russian regions over the period of 2004–2009.
Materials and Methods. This study included consecutive clinical strains of H. influenzae obtained from patients with different infections (pneumonia, acute otitis media, meningitis, bacteremia, COPD exacerbation, etc.) in Central, Volga, Ural, and Siberian federal districts of Russia over the period of 2004–2009. Susceptibility to 12 antimicrobial agents was determined by broth microdilution method according to the Clinical Laboratory Standards Institute guidelines (CLSI 2013).