Cerebrospinal fluid analysis
| Diagnosis | Cell count | Cell type | Glucose | Protein |
|---|---|---|---|---|
| Bacterial meningitis | ↑↑ | Neutrophils | ↓ | ↑↑ |
| Viral meningitis | ↑ | Lymphocytes | Normal | Normal or ↑ |
| Fungal or tuberculous meningitis | ↑ | Lymphocytes | ↓ | ↑ |
| HSV encephalitis | ↑ | Lymphocytes & erythrocytes | Normal | ↑ |
| Guillain-Barré syndrome | Normal | Normal | Normal | ↑ |