title: Resistance of beta-haemolytic streptococci and pneumococci to the tetracyclines.
mesh_terms: D004352:Drug Resistance, Microbial; D006801:Humans; D013291:Streptococcus / Q000187:drug effects* / Q000302:isolation & purification; D013296:Streptococcus pneumoniae / Q000187:drug effects*; D013307:Streptomycin / Q000494:pharmacology; D013752:Tetracycline / Q000494:pharmacology*
chemical_list: D013752:Tetracycline; D013307:Streptomycin