title: Activation of natural killer cells in vitro by a product of beta-hemolytic streptococci.
mesh_terms: D000818:Animals; D003602:Cytotoxicity, Immunologic; D006801:Humans; D006968:Hypersensitivity, Delayed / Q000276:immunology; D007372:Interferons / Q000096:biosynthesis; D007942:Leukemia, Experimental / Q000276:immunology; D008213:Lymphocyte Activation; D012882:Skin Tests; D013297:Streptococcus pyogenes / Q000201:enzymology; D013299:Streptodornase and Streptokinase / Q000494:pharmacology*
chemical_list: D007372:Interferons; D013299:Streptodornase and Streptokinase