Reduced Chlorine in Drinking Water Distribution Systems Impacts Bacterial Biodiversity in Biofilms.

Détails

Ressource 1Télécharger: 30405577_BIB_50405A9AFBDC.pdf (1931.18 [Ko])
Etat: Serval
Version: Final published version
Licence: CC BY 4.0
ID Serval
serval:BIB_50405A9AFBDC
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Reduced Chlorine in Drinking Water Distribution Systems Impacts Bacterial Biodiversity in Biofilms.
Périodique
Frontiers in microbiology
Auteur(s)
Bertelli C., Courtois S., Rosikiewicz M., Piriou P., Aeby S., Robert S., Loret J.F., Greub G.
ISSN
1664-302X (Print)
ISSN-L
1664-302X
Statut éditorial
Publié
Date de publication
2018
Peer-reviewed
Oui
Volume
9
Pages
2520
Langue
anglais
Notes
Publication types: Journal Article
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.
Mots-clé
16S rRNA, biofilm, chlorination, chlorine, drinking water, metagenomics, microbiome
Pubmed
Web of science
Open Access
Oui
Création de la notice
11/11/2018 16:34
Dernière modification de la notice
29/05/2019 7:08
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