The Effect of Lymphocyte Recovery on Lymphocyte Typing Results

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Abstract
This study examines the relationship between percent recovery of lymphocytes and T- and B-cell typing results. Lymphocytes were recovered from heparinized whole blood by density gradient centrifugation. T- and B-cells were enumerated by spontaneous sheep rosetting and direct fluorescent antibody staining for surface immunoglobulin, respectively. The findings indicate that at low recovery levels (<80%) there is a significant increase in variability of lymphocyte typing results and a significant increase in IgG-bearing B-lymphocytes. Possible explanations for these findings are discussed. These results suggest that lymphocyte typing results should be interpreted in relation to recovery level and that recovery levels of ≥80% are desirable.

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