<prompt> Streptococcal pneumoniae presents at5 years5-15 years20-25 years30-40 years  <response>: Streptococcus pneumoniae is the leading cause of pneumonia, both lobar and bronchopneumonia. Pneumonia is common at the extreme of ages:Children especially 5 years of ageElderly 60 - 65 years Serotypes 6, 14, 18, 19 and 23 are responsible for most cases of pneumonia in children, while serotypes 1, 3, 4, 7, 8 and 12 cause pneumonia in adults. 