title: [Increase in virulence of the Rickettsiae prowazekii vaccine strain E by its passage in the lungs of white mice. I].
mesh_terms: D000818:Animals; D001428:Bacterial Vaccines; D006168:Guinea Pigs; D008168:Lung; D051379:Mice; D012283:Rickettsia prowazekii / Q000472:pathogenicity*; D014774:Virulence
chemical_list: D001428:Bacterial Vaccines
vernacular_title: Povyshenie virulentnosti baktsinnogo shtamma e rikketsiĭ provacheka pri passirovanii v legkikh belykh mysheĭ. I.