<prompt> Most common cause of neonatal meningitis -StaphylococcusE. coliH. influenzePneumococcus  <response>: Ans. is b i.e., E. coli Group B streptococcus followed by E.coli are the two most common causes of neonatal meningitis. Most common cause of neonatal meningitis -- Group B streptococcus Str. agalactiae Second most common cause of neonatal meningitis -- E.coli 