RT Journal Article SR Electronic T1 Chronic and recurrent meningitis JF Practical Neurology JO Pract Neurol FD BMJ Publishing Group Ltd SP 348 OP 361 DO 10.1136/jnnp.2008.157396 VO 8 IS 6 A1 L Ginsberg A1 D Kidd YR 2008 UL http://pn.bmj.com/content/8/6/348.abstract AB Chronic meningitis is defined as the persistence of clinical symptoms and signs of meningitis, with or without abnormal cerebrospinal fluid, for more than four weeks. In as many as one third of cases, no cause is found. In the remainder, infective, neoplastic and so-called aseptic disorders may be identified. Important infective causes include partially treated bacterial (pyogenic), tuberculous, syphilitic, Lyme and fungal meningitis. Sarcoidosis, Behçet’s disease, vasculitis and drugs are major non-infective, non-malignant causes. The definitive diagnosis of the cause of chronic meningitis may be made only after extensive investigation. This review describes the clinical features and causes of chronic and recurrent meningitis, and provides an algorithm for investigation and treatment.