title: Change of host range in a resistance factor.
mesh_terms: D000667:Ampicillin; D004926:Escherichia coli; D005111:Extrachromosomal Inheritance; D005827:Genetics, Microbial; D010403:Penicillin Resistance; D012475:Salmonella; D012486:Salmonella typhimurium; D013307:Streptomycin
chemical_list: D000667:Ampicillin; D013307:Streptomycin