Cerebrospinal fluid (CSF) samples (n = 50) from patients with neurological disease (bacterial infection, viral infection, neuroborreliosis and multiple sclerosis) were analysed to characterize cell populations by fluorescent immunocytometry with the CD-Sapphire haematology analyser. Supplementary CD-Sapphire cellular immunological analysis of most CSF samples is feasible using the procedure detailed in this communication.