title: The nature of the lethal factor of Shigella flexneri.
mesh_terms: D000941:Antigens; D001431:Bacteriological Techniques; D001435:Bacteriophages / Q000166:cytology / Q000276:immunology*; D004405:Dysentery, Bacillary / Q000401:mortality; D005374:Filtration; D006801:Humans; D008854:Microscopy, Electron; D009154:Mutation; D012760:Shigella / Q000276:immunology / Q000472:pathogenicity*
chemical_list: D000941:Antigens