title: Genetic stability of IncH1 and other incompatibility group R-plasmids in Salmonella typhi.
mesh_terms: D004352:Drug Resistance, Microbial; D006801:Humans; D011815:R Factors / Q000187:drug effects*; D012485:Salmonella typhi / Q000235:genetics; D014435:Typhoid Fever / Q000188:drug therapy*