Group B strep is more common, whereas E. coli is more fatal.
Listeria is most often found in those older than 50 who are immunocompromised.
Meningococcal meningitis (from Neisseria meningitidis) occurs most often in teens and young adults.
Pneumococcal meningitis from Streptococcus pneuomniae is the most common cause of bacterial meningitis across all ages.
Waterhouse-Friderichsen syndrome can occur in meningococcal and pneumococcal meningitis, wherein patients present with septicemia, cutaneous petechiae and purpura, and adrenal gland hemorrhagic infarcts.
Neurosyphilis also causes a basilar meningitis and causes gummas. It manifests with obliterative endarteritis (often presenting with sensori-neuronal hearing loss).
Lyme disease is a rare cause of meningitis. Indicate that it is one of the few causes of bilateral facial palsies. It is caused by the Ixodes tick.