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High-risk clones of *Pseudomonas aeruginosa* contaminate the drinking water networks of French cities

Environmental Studies and Forestry

High-risk clones of *Pseudomonas aeruginosa* contaminate the drinking water networks of French cities

A. Horikian, A. Jeanvoine, et al.

This research conducted by Ani Horikian, Audrey Jeanvoine, and others uncovers alarming insights into the contamination of drinking water networks in eight French cities with *Pseudomonas aeruginosa*. The study reveals the presence of high-risk clones and highlights the significance of persister cells in monitoring these networks, pointing to shared genetic elements that suggest a common source of contamination.

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~3 min • Beginner • English
Abstract
Pseudomonas aeruginosa is a major opportunistic pathogen responsible for severe infections in immunocompromised patients. The contamination of drinking water networks (DWNs) with this pathogen is underestimated, as it is mostly in the state of persister cells undetected by the recommended monitoring technique. We collected water samples from eight cities distant from each other and searched for P. aeruginosa using a culture-based method that resuscitates persister cells. The genomes of isolates were sequenced. Five DWNs of the eight tested (62.5%) were contaminated with P. aeruginosa, of which four were contaminated with high-risk clones (ST308, ST395). Surprisingly, the ST308 isolates previously identified from an independent and distant DWNs were found. Most P. aeruginosa isolates shared a genetic link with the four isolated related to copper-ions. The population structure of isolates can result from both a common source of contamination by plumbing supplies and the selection of clones sharing genetic elements that presumably aided their propagation in DWNs.
Publisher
npj Clean Water
Published On
May 16, 2024
Authors
Ani Horikian, Audrey Jeanvoine, Abdallah Amarache, Morgane Tourret, Jérôme Ory, Hélène Bouletresta, Nathalie Van der Mee Marquet, Nadine Lemaitre, Matthieu Evenillard, Didier Lepelletier, Xavier Bertrand, Benoît Valiot, Didier Hocquet
Tags
drinking water networks
Pseudomonas aeruginosa
high-risk clones
persister cells
contamination
genomic sequencing
plumbing supplies
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