title: In vitro lymphocyte transformation induced by pre-existing hypersensitivity to foetal calf serum.
mesh_terms: D000818:Animals; D002417:Cattle; D046508:Culture Techniques; D005260:Female; D005333:Fetus / Q000276:immunology; D006168:Guinea Pigs; D006968:Hypersensitivity, Delayed; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000276:immunology*; D008297:Male; D012882:Skin Tests; D013045:Species Specificity; D014374:Tuberculin Test