Increased virulence of the E vaccine strain of Rickettsia prowazeki passaged in the lungs of white mice and guinea pigs.
D000281:Administration, Intranasal; D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis; D002642:Chick Embryo; D003168:Complement Fixation Tests; D006168:Guinea Pigs; D007274:Injections, Intraperitoneal; D008168:Lung / Q000382:microbiology; D008297:Male; D051379:Mice; D010537:Peritoneum / Q000382:microbiology; D008003:Phthiraptera; D012282:Rickettsia Infections / Q000276:immunology / Q000382:microbiology; D012283:Rickettsia prowazekii / Q000254:growth & development / Q000472:pathogenicity*; D013737:Testis / Q000382:microbiology; D014765:Viral Vaccines; D014774:Virulence
D000907:Antibodies, Bacterial; D014765:Viral Vaccines