CSF findings: Glucose 1.2 mmol/L, Protein 0.80 g/L, Lactate 3.0 mmol/L. Most likely diagnosis?

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CSF findings: Glucose 1.2 mmol/L, Protein 0.80 g/L, Lactate 3.0 mmol/L. Most likely diagnosis?

Low glucose in the CSF combined with high protein and elevated lactate points to bacterial meningitis. Bacteria consume CSF glucose and trigger strong inflammatory changes, which raises CSF protein as the barrier becomes more permeable. Lactate climbs because bacteria and inflammatory cells metabolize glucose rapidly in the inflamed environment. Viral meningitis typically shows normal glucose, only mild protein rise, and normal lactate, while subarachnoid hemorrhage usually presents with blood in the CSF rather than such a glucose-lactate pattern. Fungal meningitis can also lower glucose and raise protein, but lactate is not as reliably elevated as with bacterial infection.

Low glucose in the CSF combined with high protein and elevated lactate points to bacterial meningitis. Bacteria consume CSF glucose and trigger strong inflammatory changes, which raises CSF protein as the barrier becomes more permeable. Lactate climbs because bacteria and inflammatory cells metabolize glucose rapidly in the inflamed environment. Viral meningitis typically shows normal glucose, only mild protein rise, and normal lactate, while subarachnoid hemorrhage usually presents with blood in the CSF rather than such a glucose-lactate pattern. Fungal meningitis can also lower glucose and raise protein, but lactate is not as reliably elevated as with bacterial infection.

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