the pleural and the blood t-lymphocytes and the t-cell lines were also characterized phenotypically : although the majority of the t-lymphocytes present in the pleural space after mycobacterium tuberculosis infection were leu-3-positive ( helper t-cells ) , t-cell lines proliferating in response to ppd included high numbers of leu-2-positive cells ( suppressor/cytotoxic t-cells ) .
C0041296
tuberculosis
C0034131
ppd