Streptococcus pneumoniae(29) Haemophilus influenzae(8) children(5) Tetanus(5) Japan(4) pertussis(4) PCV7(4) vaccination(3) Pneumococcal pneumonia(3) Moraxella catarrhalis(3) invasive pneumococcal disease(3) Vaccine(3) bacterial meningitis(3) Multidrug resistance(3) pneumococcal vaccine(3) serotypes(3) antimicrobial resistance(3) acute otitis media(3) MLST(3) serotype replacement(3) Pneumonia(2) immunocompetent patient(2) PCV13(2) Non-invasive pneumococcal disease(2) multilocus sequence typing(2) Antibiotic resistance(2) Whooping cough(2) biofilm(2) Travelers(2) pyelonephritis(2)