Automated cerebrospinal fluid cell count - New reference ranges and evaluation of its clinical use in central nervous system infections

We suggest new CSF cell count reference ranges of < 4 cells/μL for lymphocytes, < 3 cells/μL for monocytes and < 3 cells/μL for granulocytes. The separation of mononuclear cells into lymphocytes and monocytes did not facilitate the discrimination between Lyme neuroborreliosis and viral CNS infection.