Cerebrospinal fluid cell count: Adults: (0-8)*106/L. Children: (0-15)*106/L. Lymphocytes: 0.70 (70%), monocytes 0.30 (30%) Glucose: 2.5-4.5 mmol/L Chloride: 120-130 mmol/L The “conventional” cerebrospinal fluid cell count is only 1 μl of CSF observed in the dark field, based on the morphological classification of the nuclei. The morphological classification of the nucleus, in addition to red blood cells, generally can only identify mononuclear cells (including monocytes, lymphocytes and plasma cells, etc.) and multinucleated cells (including eosinophils and neutrophils, etc.) two types of cells. Cells: 1, erythrocytes 2, monocytes mononuclear cells lymphocytes plasma cells 3, multinuclear cells neutrophils eosinophils cell sorting count: lymphocytes 40% to 80%, monocytes 15% to 45%, neutrophils 0-6%. Clinical significance of cerebrospinal fluid cell sorting count: The cell sorting count of cerebrospinal fluid helps in the diagnosis and differential diagnosis of central nervous system diseases. 1, neutrophilia: mostly seen in bacterial septic meningitis, often up to (1 ~ 20) × 10^9 / L; early viral meningoencephalitis, early tuberculous or fungal meningitis, rarely more than 1 × 109 / L, also seen in the central nervous system after hemorrhage, repeated lumbar puncture, subarachnoid injection of foreign bodies, chronic granulocytic leukemia and metastatic tumors of the central nervous system. 2, lymphocytosis: seen in viral encephalitis, syphilitic meningoencephalitis, tuberculous or fungal meningitis, parasitic diseases, etc., when there is often a mixed cell reaction (including plasma cells, macrophages, monocytes, etc.), the cell count often reaches 1×10^9/L, also seen in multiple sclerosis, polyneuritis and other non-infectious diseases. 3. Eosinophils are seen in parasitic and fungal infections, acute polyneuritis, allergic reactions, and cerebral lymphocytic leukemia. 4. Basophils are seen in parasitic infections, chronic granulocytic leukemia involving the meninges. 5.Monocytes often increase with lymphocytes and plasma cells. 6, macrophages are seen in tuberculous or fungal meningitis, in response to the presence of red blood cells, foreign bodies, fat, etc. in the cerebrospinal fluid, the intake of drugs such as ibuprofen, sulfamethoxazole, Sulindac can increase the number of cells in the cerebrospinal fluid