Importance of antimicrobial susceptibility testing of Streptococcus pneumoniae.

@article{Tarpay1978ImportanceOA,
  title={Importance of antimicrobial susceptibility testing of Streptococcus pneumoniae.},
  author={Martha M. Tarpay},
  journal={Antimicrobial agents and chemotherapy},
  year={1978},
  volume={14 4},
  pages={628-9}
}
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).