title: Comparative study of gonococcal susceptibility to penicillin in the United States, 1955-1969.
mesh_terms: D001431:Bacteriological Techniques; D006069:Gonorrhea / Q000453:epidemiology; D006801:Humans; D008826:Microbial Sensitivity Tests; D009344:Neisseria gonorrhoeae / Q000187:drug effects*; D010400:Penicillin G / Q000494:pharmacology*; D012189:Retrospective Studies; D014481:United States
chemical_list: D010400:Penicillin G