title: R factors in strains of Shigella dysenteriae type 1 isolated in the western hemisphere during 1969-1970.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002489:Central America; D002701:Chloramphenicol / Q000494:pharmacology; D004196:Disease Outbreaks; D004352:Drug Resistance, Microbial; D004405:Dysentery, Bacillary / Q000453:epidemiology; D004926:Escherichia coli; D008800:Mexico; D012762:Shigella dysenteriae / Q000187:drug effects*; D013307:Streptomycin / Q000494:pharmacology; D013449:Sulfonamides / Q000494:pharmacology; D013752:Tetracycline / Q000494:pharmacology; D014481:United States
chemical_list: D000900:Anti-Bacterial Agents; D013449:Sulfonamides; D002701:Chloramphenicol; D013752:Tetracycline; D013307:Streptomycin