[Meningitis and encephalitis in Poland in 2001].

2367 cases of meningitis and 571 of encephalitis were reported in Poland in 2001. Among meningitis 1324 cases were classified as viral and 838 as bacterial. Among encephalitis cases, 117 were classified as bacterial and 383 as viral. Etiological factor was determined in 419 (44%) cases of bacterial meningitis/encephalitis. Among them Neisseria meningitidis was found in 106 cases, Haemophilus influenzae in 75 cases and Streptococcus pneumoniae in 99 cases. As in the past type B was the predominant type of N. meningitidis cultured from patients. 210 cases of tick borne encephalitis were reported in Poland in 2001, most of them from endemic areas of north-eastern part of the country.