All-cause meningitis in the elderly except -
Causes of meningitis in elderly 

Pneumococci (most common)
Gram negative bacilli
Staphylococcus aureus
Meningiococci (2nd most common)
Listeria monocytogenes
Streptococcus
H. influenza
M. tuberculosis
HSV2
Pneumococci
Gram negative bacteria
Listeria
HSV2