title: R factors conferring resistance to trimethoprim but not sulphonamides.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology; D004352:Drug Resistance, Microbial; D004926:Escherichia coli / Q000187:drug effects; D005111:Extrachromosomal Inheritance; D005493:Folic Acid Antagonists / Q000494:pharmacology*; D011743:Pyrimidines / Q000494:pharmacology*; D013307:Streptomycin / Q000494:pharmacology; D013449:Sulfonamides / Q000494:pharmacology*; D014295:Trimethoprim / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D005493:Folic Acid Antagonists; D011743:Pyrimidines; D013449:Sulfonamides; D014295:Trimethoprim; D013307:Streptomycin