title: An experimental study on a derivative of Laigret-Durand's strain of murine rickettsiae for the preparation of living typhus vaccine; isolation of ectromelia virus from the vaccine strain.
mesh_terms: D000818:Animals; D004481:Ectromelia virus; D004482:Ectromelia, Infectious; D019369:Life; D051379:Mice; D012281:Rickettsia; D012290:Rickettsial Vaccines; D014438:Typhus, Epidemic Louse-Borne; D014612:Vaccines; D014780:Viruses / Q000208:ethnology*
chemical_list: D012290:Rickettsial Vaccines; D014612:Vaccines; C028280:typhus vaccine
keywords: RICKETTSIA; TYPHUS/vaccine; VIRUSES/culture