title: Immunological studies of rickettsia. Purification of complement-fixing antigens of Rickettsia orientalis by ether extraction.
mesh_terms: D000818:Animals; D000941:Antigens / Q000032:analysis*; D003168:Complement Fixation Tests; D004987:Ethers; D006801:Humans; D008722:Methods; D051379:Mice; D012285:Orientia tsutsugamushi / Q000276:immunology*; D012612:Scrub Typhus / Q000276:immunology
chemical_list: D000941:Antigens; D004987:Ethers