The impact of pipeline changes and temperature increase in a hospital historically colonised with Legionella

Abstract Healthcare-related Legionnaires’ disease has a devastating impact on high risk patients, with a case fatality rate of 30–50%. Legionella prevention and control in hospitals is therefore crucial. To control Legionella water colonisation in a hospital setting we evaluated the effect of pipeli...

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Autores principales:	S. Quero, N. Párraga-Niño, M. Garcia-Núñez, M. L. Pedro-Botet, L. Gavaldà, L. Mateu, M. Sabrià, J. M. Mòdol
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6cb75596bb344165aafa3dd8df571696
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spelling	oai:doaj.org-article:6cb75596bb344165aafa3dd8df5716962021-12-02T13:56:56ZThe impact of pipeline changes and temperature increase in a hospital historically colonised with Legionella10.1038/s41598-021-81625-62045-2322https://doaj.org/article/6cb75596bb344165aafa3dd8df5716962021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81625-6https://doaj.org/toc/2045-2322Abstract Healthcare-related Legionnaires’ disease has a devastating impact on high risk patients, with a case fatality rate of 30–50%. Legionella prevention and control in hospitals is therefore crucial. To control Legionella water colonisation in a hospital setting we evaluated the effect of pipeline improvements and temperature increase, analysing 237 samples over a 2-year period (first year: 129, second year: 108). In the first year, 25.58% of samples were positive for Legionella and 16.67% for amoeba. Assessing the distance of the points analysed from the hot water tank, the most distal points presented higher proportion of Legionella colonisation and lower temperatures (nearest points: 6.4% colonised, and temperature 61.4 °C; most distal points: 50% and temperature 59.1 °C). After the first year, the hot water system was repaired and the temperature stabilised. This led to a dramatic reduction in Legionella colonisation, which was negative in all the samples analysed; however, amoeba colonisation remained stable. This study shows the importance of keeping the temperature stable throughout the circuit, at around 60 °C. Special attention should be paid to the most distal points of the circuit; a fall in temperature at these weak points would favour the colonisation and spread of Legionella, because amoeba (the main Legionella reservoir) are not affected by temperature.S. QueroN. Párraga-NiñoM. Garcia-NúñezM. L. Pedro-BotetL. GavaldàL. MateuM. SabriàJ. M. MòdolNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q S. Quero N. Párraga-Niño M. Garcia-Núñez M. L. Pedro-Botet L. Gavaldà L. Mateu M. Sabrià J. M. Mòdol The impact of pipeline changes and temperature increase in a hospital historically colonised with Legionella
description	Abstract Healthcare-related Legionnaires’ disease has a devastating impact on high risk patients, with a case fatality rate of 30–50%. Legionella prevention and control in hospitals is therefore crucial. To control Legionella water colonisation in a hospital setting we evaluated the effect of pipeline improvements and temperature increase, analysing 237 samples over a 2-year period (first year: 129, second year: 108). In the first year, 25.58% of samples were positive for Legionella and 16.67% for amoeba. Assessing the distance of the points analysed from the hot water tank, the most distal points presented higher proportion of Legionella colonisation and lower temperatures (nearest points: 6.4% colonised, and temperature 61.4 °C; most distal points: 50% and temperature 59.1 °C). After the first year, the hot water system was repaired and the temperature stabilised. This led to a dramatic reduction in Legionella colonisation, which was negative in all the samples analysed; however, amoeba colonisation remained stable. This study shows the importance of keeping the temperature stable throughout the circuit, at around 60 °C. Special attention should be paid to the most distal points of the circuit; a fall in temperature at these weak points would favour the colonisation and spread of Legionella, because amoeba (the main Legionella reservoir) are not affected by temperature.
format	article
author	S. Quero N. Párraga-Niño M. Garcia-Núñez M. L. Pedro-Botet L. Gavaldà L. Mateu M. Sabrià J. M. Mòdol
author_facet	S. Quero N. Párraga-Niño M. Garcia-Núñez M. L. Pedro-Botet L. Gavaldà L. Mateu M. Sabrià J. M. Mòdol
author_sort	S. Quero
title	The impact of pipeline changes and temperature increase in a hospital historically colonised with Legionella
title_short	The impact of pipeline changes and temperature increase in a hospital historically colonised with Legionella
title_full	The impact of pipeline changes and temperature increase in a hospital historically colonised with Legionella
title_fullStr	The impact of pipeline changes and temperature increase in a hospital historically colonised with Legionella
title_full_unstemmed	The impact of pipeline changes and temperature increase in a hospital historically colonised with Legionella
title_sort	impact of pipeline changes and temperature increase in a hospital historically colonised with legionella
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6cb75596bb344165aafa3dd8df571696
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The impact of pipeline changes and temperature increase in a hospital historically colonised with Legionella

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