title: Failure of gamma-interferon induction in germfree mouse spleen cells by OK-432, a preparation of Streptococcus pyogenes.
mesh_terms: D000818:Animals; D005856:Germ-Free Life; D066298:In Vitro Techniques; D007371:Interferon-gamma / Q000096:biosynthesis*; D051379:Mice; D008813:Mice, Inbred ICR; D013154:Spleen / Q000276:immunology*; D013297:Streptococcus pyogenes / Q000276:immunology*
chemical_list: D007371:Interferon-gamma