title: Observations on the decreasing frequency of multiply resistant strains of Shigella sonnei.
mesh_terms: D003470:Culture Media; D004352:Drug Resistance, Microbial; D004755:Enterobacteriaceae / Q000187:drug effects; D005827:Genetics, Microbial; D008826:Microbial Sensitivity Tests; D012764:Shigella sonnei / Q000187:drug effects* / Q000302:isolation & purification
chemical_list: D003470:Culture Media