title: The incidence of R factors among hospital strains of enterobacteriaceae.
mesh_terms: D001741:Black or African American; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D044383:Black People; D003227:Conjugation, Genetic; D003428:Cross Infection / Q000382:microbiology; D004352:Drug Resistance, Microbial; D004755:Enterobacteriaceae / Q000187:drug effects* / Q000302:isolation & purification; D004926:Escherichia coli; D005006:Ethnicity; D005111:Extrachromosomal Inheritance; D006801:Humans; D013019:South Africa
chemical_list: D000900:Anti-Bacterial Agents