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B and [[t Cell count]]

a test that measures the respective quantities of b lymphocytes and t lymphocytes. this test is often performed in the analysis of an immune deficiency disorder. Normal values include: 68 to 75% of total lymphocytes are t lymphocytes and 10 to 20% are b lymphocytes.

Increased t-cell counts can indicate infectious mononucleosis, acute lymphocytic leukaemia or multiple myeloma.

Increased b lymphocytes can indicate chronic lymphocytic leukaemia, multiple myeloma, Waldenstrom's macroglobulinaemia or di george syndrome. Decreased t-cells may indicate congenital t-cell deficiency, wiskott-aldrich syndrome or aids. Decreased b-cells may indicate acute lymphocytic leukaemia or a congenital immunoglobulin deficiency disorder.