Erythromycin-resistant beta-haemolytic streptococci in North Yorkshire.
D004352:Drug Resistance, Microbial; D004739:England; D004917:Erythromycin / Q000494:pharmacology*; D006801:Humans; D013290:Streptococcal Infections / Q000382:microbiology*; D013291:Streptococcus / Q000187:drug effects*
D004917:Erythromycin