Abstract
AbstractMigration inhibition using mixtures of human peripheral blood lymphocytes and non‐sensitized guinea pig peritoneal exudate cells was demonstrable with purified protein derivative of tuberculin (PPD) and Candida albicans extract (CAE) when lymphocytes were obtained from individuals with a delayed type skin reaction to these antigens. No migration inhibition occurred when lymphocytes were used from skin test negative individuals.Furthermore it was found that lymphocytes from some skin test negative persons, which did not induce migration inhibition, showed, however, an increased DNA synthesis when cultured in vitro with PPD. This indicates that a dissociation between the results of migration inhibition, skin test and lymphocyte transformation can occur not only in patients with immune disorders, as has been described by other investigators, but also in healthy individuals.
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