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Improved disk diffusion method for simple detection of group B streptococci with reduced penicillin susceptibility
Rikuko Goto1, Wanchun Jin1, Jun-Ichi Wachino1
1Department of Bacteriology, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan.
Diagnostic Microbiology and Infectious Disease
|December 31, 2022
Abstract:
We used 73 group B Streptococcus with reduced penicillin susceptibility (PRGBS) isolates and determined more rational cutoff values of previously developed disk diffusion method for detecting PRGBS using oxacillin, ceftizoxime, and ceftibuten disks. Using the novel cutoff values, the three disks showed high sensitivity and specificity, which were above 90.0%.

