<prompt> Most common cause of pyogenic meningitis in 6 month to 2 years of age is-Staphylococcus aureusPneumococcusStreptococcus pneumoniaH. influeuenzde  <response>: Ans. is c i.e., Streptococcus pneumoniae Commonest causes of meningitis o Neonatal -- Group B streptococcus most common, E.coli second most common. o 2 months to 3 years -- Pneumococci Meningococci H. influenzae o 3 years to 20 years -- Meningococcus o 20 years -- Pneumococci 