Titre
Reduced Chlorine in Drinking Water Distribution Systems Impacts Bacterial Biodiversity in Biofilms.
Type
article
Institution
UNIL/CHUV/Unisanté + institutions partenaires
Périodique
Auteur(s)
Bertelli, C.
Auteure/Auteur
Courtois, S.
Auteure/Auteur
Rosikiewicz, M.
Auteure/Auteur
Piriou, P.
Auteure/Auteur
Aeby, S.
Auteure/Auteur
Robert, S.
Auteure/Auteur
Loret, J.F.
Auteure/Auteur
Greub, G.
Auteure/Auteur
Liens vers les personnes
Liens vers les unités
ISSN
1664-302X
Statut éditorial
Publié
Date de publication
2018
Volume
9
Première page
2520
Peer-reviewed
Oui
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: epublish
Publication Status: epublish
Résumé
In drinking water distribution systems (DWDS), a disinfectant residual is usually applied to limit bacterial regrowth. However, delivering water with no or reduced chlorine residual could potentially decrease the selection for antimicrobial resistant microorganisms, favor bacterial regrowth and result in changes in bacterial populations. To evaluate the feasibility of water reduction in local DWDS while ensuring water safety, water quality was measured over 2 months in two different networks, each of them harboring sub-areas with normal and reduced chlorine. Water quality remained good in chlorine reduced samples, with limited development of total flora and absence of coliforms. Furthermore, 16S rRNA amplicon-based metagenomics was used to investigate the diversity and the composition of microbial communities in the sub-networks. Taxonomic classification of sequence reads showed a reduced bacterial diversity in sampling points with higher chlorine residuals. Chlorine disinfection created more homogeneous bacterial population, dominated by <i>Pseudomonas</i> , a genus that contains some major opportunistic pathogens such as <i>P. aeruginosa</i> . In the absence of chlorine, a larger and unknown biodiversity was unveiled, also highlighted by a decreased rate of taxonomic classification to the genus and species level. Overall, this experiment in a functional DWDS will facilitate the move toward potable water delivery systems without residual disinfectants and will improve water taste for consumers.
PID Serval
serval:BIB_50405A9AFBDC
PMID
Open Access
Oui
Date de création
2018-11-11T14:34:20.650Z
Date de création dans IRIS
2025-05-20T14:35:48Z
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Nom
30405577_BIB_50405A9AFBDC.pdf
Version du manuscrit
published
Licence
https://creativecommons.org/licenses/by/4.0
Taille
1.89 MB
Format
Adobe PDF
PID Serval
serval:BIB_50405A9AFBDC.P001
URN
urn:nbn:ch:serval-BIB_50405A9AFBDC7
Somme de contrôle
(MD5):4d35d58c367223dfc73b38394ed6e536