Cerebrospinal fluid (CSF) granulocytes from 4 patients with bacterial meningitis were tested for rosette formation with sheep erythrocytes (E), a standard assay for T lymphocytes. CSF granulocytes from all patients formed E rosettes, although to a varying degree (66, 63, 17 and 2, respectively). E rosettes could not be demonstrated with granulocytes from peripheral blood from the patient with 66 E-rosette-forming granulocytes in the CSF.
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