title: [Effects of R factors on virulence of the host bacteria: virulence of Salmonella LT-2 IN MICE WITH transfer of R factors from Shigella strains].
mesh_terms: D000818:Animals; D004352:Drug Resistance, Microbial; D051379:Mice; D011815:R Factors; D012486:Salmonella typhimurium / Q000472:pathogenicity*; D012760:Shigella; D014774:Virulence