title: The superficial protective antigen of R. prowazeki.
mesh_terms: D000941:Antigens; D011232:Chemical Precipitation; D003168:Complement Fixation Tests; D004586:Electrophoresis; D004987:Ethers / Q000494:pharmacology; D005615:Freezing; D006386:Hemagglutination Tests; D006801:Humans; D007115:Immunization Schedule; D007122:Immunoelectrophoresis; D009500:Neutralization Tests; D010636:Phenols / Q000494:pharmacology; D000644:Quaternary Ammonium Compounds; D012283:Rickettsia prowazekii / Q000276:immunology*; D013431:Sulfates; D014438:Typhus, Epidemic Louse-Borne / Q000517:prevention & control; D014612:Vaccines / Q000302:isolation & purification
chemical_list: D000941:Antigens; D004987:Ethers; D010636:Phenols; D000644:Quaternary Ammonium Compounds; D013431:Sulfates; D014612:Vaccines