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Leukocyte types in cerebrospinal fluid and peripheral blood enumerated immunoenzymatically in aseptic meningitis and the Guillain‐Barré syndrome

To study celltype distribution simultaneously in peripheral blood (PB) and cerebrospinal fluid (CSF) from patients with aseptic meningitis (AM) (n= 14) and Guillain‐Barré syndrome (GBS) (n= 9) we used an immunoenzymatic method that enabled the use of several monoclonal antibodies, also in CSF samples with normal cellcounts. In both patient groups a different cell‐distribution in CSF compared to PB was found with regard to pan T cells (CD5 +/anti‐Leu 1 +), T cell subpopulations (CD4 +/anti‐Leu3+, CD8 +/anti‐Leu2 +), B cells (OKB2+, OKB7 +), monocytes/macrophages (CD11+/OKM1+) and HLA/DR expressing cells, whereas the distribution of HLA/DC + cells was similar in CSF and PB. Thus, the CSF cell distribution does not reflect the distribution in PB. The proportion of T cells was higher and the proportion of B‐cells was lower in CSF than in PB in both patient groups, which is a finding similar to that in patients with multiple sclerosis. The OKT9 marker, labelling proliferating cells expressing the transferrin receptor, was not useful as marker of local proliferation.