Erythromycin resistant Streptococcus pyogenes in Merseyside.
D000293:Adolescent; D004352:Drug Resistance, Microbial; D004739:England; D004917:Erythromycin / Q000494:pharmacology*; D006801:Humans; D008297:Male; D013297:Streptococcus pyogenes / Q000302:isolation & purification*
D004917:Erythromycin