Streptococcus pneumoniae(29) Haemophilus influenzae(8) children(5) Tetanus(5) PCV7(4) Japan(4) pertussis(4) acute otitis media(3) MLST(3) serotype replacement(3) Moraxella catarrhalis(3) Pneumococcal pneumonia(3) vaccination(3) invasive pneumococcal disease(3) Vaccine(3) bacterial meningitis(3) pneumococcal vaccine(3) Multidrug resistance(3) antimicrobial resistance(3) serotypes(3) Japanese(2) bacterial pneumonia(2) pneumococcal conjugate vaccine(2) Disabled children(2) PCV13(2) tracheostomy(2) Pneumonia(2) immunocompetent patient(2) Non-invasive pneumococcal disease(2) biofilm(2)