Influence of sodium hypochlorite on STEC biofilm formation

VÉLEZ, VICTORIA; ETCHEVERRÍA, ANALÍA I.; COLELLO, ROCÍO; CÁCERES, MARÍA EMILIA; PADOLA, NORA LÍA

MOJ Toxicology

MedCrave

Lugar: Edmond; Año: 2019 vol. 5 p. 1 - 3

2379-6294

Shiga toxin-producing Escherichia coli (STEC) include several serotypes isolated from cases of hemorrhagic colitis and hemolytic uremic syndrome. Bacteria form biofilms in different environments, which can contaminate food and generate infections, while protecting themselves against adverse conditions such as the use of disinfectants. The aim of this study was to evaluate the effects of sodium hypochlorite at different concentrations and exposure times on the formation of STEC biofilms. In vitro assays on polystyrene plates were performed and the strains were classified according to their ability to form biofilm. They were exposed to different solutions of NaClO. The results showed that biofilm formation was moderate or weak in most cases and the use of hypochlorite is effective at concentrations greater than or equal to 5% for at less 20min.