the disease was caused by n. meningitidis in 278 ( 23 % ) , h. influenzae in 171 ( 14 % ) , s. pneumoniae in 157 ( 13 % ) , e. coli in 74 ( 6 % ) , b-group streptococcus in 61 ( 5 % ) , other bacteria ( altogether 17 species ) in 107 ( 9 % ) cases , while in 360 cases ( 30 % ) the etiology remained unknown .
C0027575
n
C0004611
bacteria