Prevalence of penicillin-resistant Streptococcus pneumoniae--Connecticut, United States, 1992-1993.
D003237:Connecticut; D010403:Penicillin Resistance; D010406:Penicillins / Q000494:pharmacology*; D013296:Streptococcus pneumoniae / Q000187:drug effects* / Q000302:isolation & purification
D010406:Penicillins