Controlling Legionella pneumophila in Showerheads: Combination of Remedial Intervention and Preventative Flushing.

ABSTRACT: Shock chlorination and remedial flushing are suggested to address Legionella pneumophila (Lp) contamination in buildings or during their (re)commissioning. However, data on general microbial measurements (adenosine tri-phosphate [ATP], total cell counts [TCC]), and the abundance of Lp are lacking to support their temporary implementation with variable water demands. In this study, the weekly short-term (3-week) impact of shock chlorination (20-25 mg/L free chlorine, 16 h) or remedial flushing (5-min flush) combined with distinct flushing regimes (daily, weekly, stagnant) was investigated in duplicates of showerheads in two shower systems. Results showed that the combination of stagnation and shock chlorination prompted biomass regrowth, with ATP and TCC in the first dr

SUBMITTER: Grimard-Conea M 

PROVIDER: S-EPMC10301046 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature