9.1.1.2 Chronic headache attributed to bacterial meningitis or meningoencephalitis

Diagnostic criteria:
A. Headache fulfilling criteria for 9.1.1 Headache attributed to bacterial meningitis or meningoencephalitis, and criterion C below
B. Bacterial meningitis or meningoencephalitis remains active or has resolved within the last 3 months
C. Headache has been present for >3 months.