Discrepancy of hydrogen peroxide production by Streptococcus sanguis / 实用口腔医学杂志

ABSTRACT

Objective: To investigate the capability of Streptococcus sanguis(S.s) producing hydrogen peroxide (HP) and screen the strains of S.s with high yield of hydrogen peroxide.Methods: S.s were isolated from supergingival plaque of people with healthy periodontium. The microorganisms were cultivated anaerobically or aerobically, then washed and incubated with KCl buffer. Hydrogen peroxide and bacterial proteins were assayed spectrophotometrically. S.oralis ATCC 10557 was used as the controls. Results: In anaerobical culture the HP production (nmol/?g) of S.s and S.oralis was 118.22?69.92 and 338.60?192.14( P