Overview Pathogens That Cause Meningitis by Age Group Newborns (0-6 mo) Children (> 6 months - < 6 years) Adults (18 - 40 years) Seniors (40 - 65 years) IC AC GBS E. coli Listeria monocytogenes S. pneumoniae N. meningitidis H. influenzae Enteroviruses (coxsackievirus, poliovirus, echovirus) S. pneumoniae N. meningitidis HSV-1 HSV-2 Enteroviruses (coxsackievirus, poliovirus, echovirus) S. pneumoniae Listeria monocytogenes S. pneumoniae Listeria monocytogenes N. meningitidis CMV JC virus Cryptococcus neoformans Toxoplasma gondi (brain abscess) Enteroviruses (coxsackievirus, poliovirus, echovirus) HSV-1 HSV-2 Naegleria fowleri Cryptococcus neoformans West Nile Virus LCMV Definitions login to view 8 more bullets Clinical presentation login to view 3 more bullets Bacterial causes of meningitis by age login to view 14 more bullets Meningitis in Immunocompromised (IC) login to view 1 more bullet Aseptic meningitis login to view 4 more bullets Herpes simplex virus (HSV) login to view 4 more bullets See also "Meningitis" Treatment login to view 9 more bullets Abbreviations login to view 3 more bullets