title: [Increase in virulence of the vaccine strain E Rickettsiae prowazekii during its passage in guinea pigs. II].
mesh_terms: D000818:Animals; D002642:Chick Embryo; D006168:Guinea Pigs; D051379:Mice; D012283:Rickettsia prowazekii / Q000302:isolation & purification / Q000472:pathogenicity*; D014774:Virulence
vernacular_title: Povyshenie virulentnosti vaktsinnogo shtamma E rikketsii Provacheka pri passirovanii na morskikh svinkakh. II.