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) bacterial meningitis(3) Moraxella catarrhalis(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) Surveillance(2) Disabled children(2) Pneumonia(2) tracheostomy(2)