title: Optochin-resistant Streptococcus pneumoniae.
mesh_terms: D000368:Aged; D004352:Drug Resistance, Microbial; D006801:Humans; D007223:Infant; D008297:Male; D011803:Quinine / Q000031:analogs & derivatives*; D013296:Streptococcus pneumoniae / Q000302:isolation & purification*
chemical_list: C017303:ethylhydrocupreine; D011803:Quinine