title: Optochin sensitivity of beta-haemolytic streptococci group A.
mesh_terms: D006801:Humans; D008826:Microbial Sensitivity Tests; D011803:Quinine / Q000031:analogs & derivatives* / Q000494:pharmacology; D013291:Streptococcus / Q000187:drug effects*
chemical_list: C017303:ethylhydrocupreine; D011803:Quinine