Patients ≥ 18 years of age presenting with clinical disease suggesting bacterial meningitis (headache, fever, stiffness of the neck, petechiae, confusion or impaired level of consciousness) in combination with one or more of the following:
Bacterial meningitis with unknown pathogen was included based on the clinical criteria above in combination with the following CSF biochemistry: >10 x 106 cells/L) in combination with low CSF glucose or glucose-ratio (<2.0 mmol/L and 0.3 respectively) or CSF lactate >3.5 mmol /L.
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