title: Proceedings: The relative abundance of R factors in faecal Escherichia coli strains of serotypes O8, O9 and O101.
mesh_terms: D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000145:classification / Q000187:drug effects*; D005243:Feces / Q000382:microbiology*; D006801:Humans; D010957:Plasmids; D011815:R Factors