Changing patterns of penicillin susceptibility of community strains of staphylococci.
D003691:Delaware; D006764:Hospitals, Community; D008826:Microbial Sensitivity Tests; D010403:Penicillin Resistance; D010406:Penicillins / Q000494:pharmacology*; D013210:Staphylococcus / Q000187:drug effects*
D010406:Penicillins