title: In vitro lymphocyte reactivity to PPD and phytohaemagglutinin in relation to PPD skin reactivity and age.
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000941:Antigens; D002247:Carbon Isotopes; D002452:Cell Count; D005260:Female; D006801:Humans; D007106:Immune Sera / Q000494:pharmacology; D066298:In Vitro Techniques; D007271:Injections, Intradermal; D037102:Lectins / Q000494:pharmacology*; D008171:Lung Diseases / Q000276:immunology; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000187:drug effects* / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D012882:Skin Tests; D013936:Thymidine / Q000378:metabolism; D014374:Tuberculin Test; D014376:Tuberculosis / Q000276:immunology
chemical_list: D000941:Antigens; D002247:Carbon Isotopes; D007106:Immune Sera; D037102:Lectins; D013936:Thymidine