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