Fundamental Differences in Inactivation Mechanisms of Escherichia coli O157:H7 Between Chlorine Dioxide and Sodium Hypochlorite.

ABSTRACT: Chlorine dioxide (ClO₂) and sodium hypochlorite (NaClO) are two chlorinated oxidizing agents that are implemented in water treatment and postharvest processing of fresh produce. While the antibacterial mechanisms of NaClO have been investigated, there are comparatively few studies that have looked at how ClO₂ kills bacteria. Therefore, the objective of this study was to compare the inactivation pathways of ClO₂ and NaClO against Escherichia coli O157:H7. Treatments consisted of 2.5, 5, and 10 ppm ClO₂ or 50, 100, and 200 ppm NaClO for 5, 10, and 15 min. Maximum log reductions of E. coli O157:H7 were 5.5 and 5.1 after treatment with ClO₂ or NaClO, respectively. Bacterial inactivation was measured using log reductions, intr

SUBMITTER: Bridges DF 

PROVIDER: S-EPMC9247566 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature