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Characterisation of Microbial Community Associated with Different Disinfection Treatments in Hospital hot Water Networks

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  • Stefania Paduano

    (Department of Biomedical, Metabolic and Neural Sciences, Section of Public Health, University of Modena and Reggio Emilia, 41125 Modena, Italy)

  • Isabella Marchesi

    (Department of Biomedical, Metabolic and Neural Sciences, Section of Public Health, University of Modena and Reggio Emilia, 41125 Modena, Italy)

  • Maria Elisabetta Casali

    (Department of Biomedical, Metabolic and Neural Sciences, Section of Public Health, University of Modena and Reggio Emilia, 41125 Modena, Italy
    University Hospital Policlinico of Modena, 41124 Modena, Italy)

  • Federica Valeriani

    (Department of Movement, Human and Health Sciences, Public Health Unit, University of Rome ‘Foro Italico’, 00135 Rome, Italy)

  • Giuseppina Frezza

    (Department of Biomedical, Metabolic and Neural Sciences, Section of Public Health, University of Modena and Reggio Emilia, 41125 Modena, Italy)

  • Elena Vecchi

    (University Hospital Policlinico of Modena, 41124 Modena, Italy)

  • Luca Sircana

    (University Hospital Policlinico of Modena, 41124 Modena, Italy)

  • Vincenzo Romano Spica

    (Department of Movement, Human and Health Sciences, Public Health Unit, University of Rome ‘Foro Italico’, 00135 Rome, Italy)

  • Paola Borella

    (Department of Biomedical, Metabolic and Neural Sciences, Section of Public Health, University of Modena and Reggio Emilia, 41125 Modena, Italy)

  • Annalisa Bargellini

    (Department of Biomedical, Metabolic and Neural Sciences, Section of Public Health, University of Modena and Reggio Emilia, 41125 Modena, Italy)

Abstract

Many disinfection treatments can be adopted for controlling opportunistic pathogens in hospital water networks in order to reduce infection risk for immunocompromised patients. Each method has limits and strengths and it could determine modifications on bacterial community. The aim of our investigation was to study under real-life conditions the microbial community associated with different chemical (monochloramine, hydrogen peroxide, chlorine dioxide) and non-chemical (hyperthermia) treatments, continuously applied since many years in four hot water networks of the same hospital. Municipal cold water, untreated secondary, and treated hot water were analysed for microbiome characterization by 16S amplicon sequencing. Cold waters had a common microbial profile at genera level. The hot water bacterial profiles differed according to treatment. Our results confirm the effectiveness of disinfection strategies in our hospital for controlling potential pathogens such as Legionella , as the investigated genera containing opportunistic pathogens were absent or had relative abundances ≤1%, except for non-tuberculous mycobacteria, Sphingomonas , Ochrobactrum and Brevundimonas . Monitoring the microbial complexity of healthcare water networks through 16S amplicon sequencing is an innovative and effective approach useful for Public Health purpose in order to verify possible modifications of microbiota associated with disinfection treatments.

Suggested Citation

  • Stefania Paduano & Isabella Marchesi & Maria Elisabetta Casali & Federica Valeriani & Giuseppina Frezza & Elena Vecchi & Luca Sircana & Vincenzo Romano Spica & Paola Borella & Annalisa Bargellini, 2020. "Characterisation of Microbial Community Associated with Different Disinfection Treatments in Hospital hot Water Networks," IJERPH, MDPI, vol. 17(6), pages 1-17, March.
    • Handle: RePEc:gam:jijerp:v:17:y:2020:i:6:p:2158-:d:336307
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    References listed on IDEAS

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    2. Yong Li & Jiejie Zhang & Jianqiang Zhang & Wenlai Xu & Zishen Mou, 2019. "Microbial Community Structure in the Sediments and Its Relation to Environmental Factors in Eutrophicated Sancha Lake," IJERPH, MDPI, vol. 16(11), pages 1-15, May.
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    4. Maria Anna Coniglio & Margherita Ferrante & Mohamed H. Yassin, 2018. "Preventing Healthcare-Associated Legionellosis: Results after 3 Years of Continuous Disinfection of Hot Water with Monochloramine and an Effective Water Safety Plan," IJERPH, MDPI, vol. 15(8), pages 1-11, July.
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    Cited by:

    1. Mihaela Ileana Ionescu & Dan Ștefan Neagoe & Alexandra Marioara Crăciun & Oana Teodora Moldovan, 2022. "The Gram-Negative Bacilli Isolated from Caves— Sphingomonas paucimobilis and Hafnia alvei and a Review of Their Involvement in Human Infections," IJERPH, MDPI, vol. 19(4), pages 1-21, February.
    2. Isabella Marchesi & Stefania Paduano & Giuseppina Frezza & Luca Sircana & Elena Vecchi & Pietro Zuccarello & Gea Oliveri Conti & Margherita Ferrante & Paola Borella & Annalisa Bargellini, 2020. "Safety and Effectiveness of Monochloramine Treatment for Disinfecting Hospital Water Networks," IJERPH, MDPI, vol. 17(17), pages 1-11, August.

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