A simultaneous method for detection and quantitation of T- and B-lymphocytes.

Assay for quantitation of B- and T--lymphocyted from small volumes of heparinized man blood has been developed by simultaneously reacting Ficoll-Hypaque purified mononuclear cells with antobody-coated chicken erythrocytes to for rosettes with B-lymphocytes, and sheep erythrocytes which formed non-immune rosettes with Tlymphocytes. Distribution of various lymphocyte populations in normals are T-cells, 60.9+/-7%, B-cells 16.4+/-4%, and lymphocytes with both receptors, 1.6+/-0.6%.