Dynamics of the Microbial Community and Opportunistic Pathogens after Water Stagnation in the Premise Plumbing of a Building.

ABSTRACT: In premise plumbing, microbial water quality may deteriorate under certain conditions, such as stagnation. Stagnation results in a loss of disinfectant residual, which may lead to the regrowth of microorganisms, including opportunistic pathogens. In the present study, microbial regrowth was investigated at eight faucets in a building over four seasons in one year. Water samples were obtained before and after 24 h of stagnation. In the first 100‍ ‍mL after stagnation, total cell counts measured by flow cytometry increased 14- to 220-fold with a simultaneous decrease in free chlorine from 0.17-0.36‍ ‍mg L^-1 to <0.02‍ ‍mg L^-1. After stagnation, total cell counts were not significantly different among seasons; however, the composition of the microbial community varied sea

SUBMITTER: Rahmatika I 

PROVIDER: S-EPMC8958293 | biostudies-literature | 2022

REPOSITORIES: biostudies-literature