title: Letter: penicillin-resistant pneumococci and pneumonia.
mesh_terms: D002353:Carrier State / Q000382:microbiology; D002648:Child; D006801:Humans; D009512:New Guinea; D010402:Penicillin G Procaine / Q000627:therapeutic use*; D010403:Penicillin Resistance; D011014:Pneumonia / Q000382:microbiology / Q000517:prevention & control*; D012703:Serotyping; D013296:Streptococcus pneumoniae / Q000302:isolation & purification*
chemical_list: D010402:Penicillin G Procaine