title: Importance of antimicrobial susceptibility testing of Streptococcus pneumoniae.
abstract: Six of 36 strains of Streptococcus pneumoniae isolated in our laboratory during 1977 showed relative resistance to penicillin G. This level of resistance was detectable only by the broth dilution method. Using the disk diffusion method, all six strains appeared susceptible (zone size > 29 mm).
mesh_terms: D006801:Humans; D007223:Infant; D008826:Microbial Sensitivity Tests; D010400:Penicillin G / Q000494:pharmacology*; D010403:Penicillin Resistance; D013296:Streptococcus pneumoniae / Q000187:drug effects*
chemical_list: D010400:Penicillin G