Penicillin-resistant pneumococci.
N
N
Manek
D002702:Chloramphenicol Resistance; D006801:Humans; D008826:Microbial Sensitivity Tests / Q000379:methods; D010403:Penicillin Resistance; D013296:Streptococcus pneumoniae / Q000187:drug effects / Q000302:isolation & purification*