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T and B lymphocytes in multiple sclerosis.

The percentage and total number of E and EAC rosettes, as indicators of T and B lymphocytes respectively, were studied in the blood of subjects with multiple sclerosis (MS) and normals. MS patients in acute exacerbation were found to have a decrease in E rosettes and an increase in EAC rosettes. The relationship of these findings to the pathogenesis of MS is unclear; several possible pathogenetic implications are considered.