Purification of Rickettsia rickettsi by density-gradient zonal centrifugation.
D000818:Animals; D000942:Antigens, Bacterial / Q000032:analysis; D002452:Cell Count; D002501:Centrifugation, Zonal; D002642:Chick Embryo; D003168:Complement Fixation Tests; D005321:Extraembryonic Membranes / Q000382:microbiology; D007739:L Cells; D051379:Mice; D008854:Microscopy, Electron; D012284:Rickettsia rickettsii / Q000276:immunology / Q000302:isolation & purification* / Q000648:ultrastructure; D013395:Sucrose
D000942:Antigens, Bacterial; D013395:Sucrose