Infection—Chronic infective meningitis may present with
recurrent clinical episodes separated by asymptomatic
periods, even though the CSF is abnormal throughout.
This pattern may be seen with syphilis, brucellosis, Lyme
disease, fungal meningitis, and human immunodeficiency
virus (HIV). With other organisms, a different mechanism
of genuine reactivation of latent infection applies. The
prime examples here are herpes simplex virus (HSV),
Epstein-Barr virus (EBV), and Toxoplasma.