Streptococcus pneumoniae(29) Haemophilus influenzae(8) children(5) Tetanus(5) PCV7(4) Japan(4) pertussis(4) Multidrug resistance(3) acute otitis media(3) serotypes(3) serotype replacement(3) MLST(3) Pneumococcal pneumonia(3) invasive pneumococcal disease(3) Vaccine(3) bacterial meningitis(3) pneumococcal vaccine(3) vaccination(3) antimicrobial resistance(3) Moraxella catarrhalis(3) Pneumococcal cholangitis(2) Travelers(2) bacterial pneumonia(2) pyelonephritis(2) pneumococcal conjugate vaccine(2) Plasmodium falciparum(2) Japanese(2) Disabled children(2) Pneumonia(2) Surveillance(2)