Microbial and physicochemical parameters associated with Legionella contamination in hot water recirculation systems

Hot water recirculation systems (HWRS) in hotels and nursing homes, which are common in countries such as Spain, have been related to outbreaks of legionellosis. To establish the relationships of microbial and physicochemical parameters, especially protozoa, with the occurrence of Legionella in HWRS...

Descripción completa

Detalles Bibliográficos
Autores: Serrano Suárez, Alejandra, Dellundé, Jordi, Salvadó i Cabré, Humbert, Cervero Aragó, Sílvia, Méndez Viera, Javier, Canals, Oriol, Blanco, Silvia, Arcas Pons, Antoni, Araujo Boira, Rosa Ma.
Tipo de recurso: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2013
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/227735
Acceso en línea:https://hdl.handle.net/2445/227735
Access Level:acceso abierto
Palabra clave:Contaminació microbiana
Legionel·la
Microbiologia aquàtica
Microbial contamination
Legionella
Water microbiology
id ES_a9ca3d0cd0fc6058cbae2e05f01de1e0
oai_identifier_str oai:diposit.ub.edu:2445/227735
network_acronym_str ES
network_name_str España
repository_id_str
spelling Microbial and physicochemical parameters associated with Legionella contamination in hot water recirculation systemsSerrano Suárez, AlejandraDellundé, JordiSalvadó i Cabré, HumbertCervero Aragó, SílviaMéndez Viera, JavierCanals, OriolBlanco, SilviaArcas Pons, AntoniAraujo Boira, Rosa Ma.Contaminació microbianaLegionel·laMicrobiologia aquàticaMicrobial contaminationLegionellaWater microbiologyHot water recirculation systems (HWRS) in hotels and nursing homes, which are common in countries such as Spain, have been related to outbreaks of legionellosis. To establish the relationships of microbial and physicochemical parameters, especially protozoa, with the occurrence of Legionella in HWRS, 231 samples from hotels and nursing homes were analysed for Legionella, protozoa, heterotrophic plate counts (HPC) at 22 and 37 °C, Pseudomonas, metals, temperature and others. Legionella pneumophila was the dominant species isolated, and 22 % were sg. 1. The sampling method became particularly important in order to define which factors were involved on the occurrence of Legionella. Results showed that the bacteria and the accompanying microbiota were more abundant in the first flush water whose temperature was lower. The bacteria occurred in those samples with high HPC and were inversely correlated with high temperatures. Multivariate regression showed that a concentration above 1× 105CFU/100 mL of HPC at 37 °C, Fe above 0.095 ppm and the presence of protozoa increased significantly the risk of Legionella colonization, while univariant regression showed that the presence of Cu above 0.76 ppm and temperature above 55 °C diminished it. Therefore, to reduce the risk associated with Legionella occurrence in HWRS these parameters should be taken into consideration.Springer Verlag2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionapplication/pdfhttps://hdl.handle.net/2445/227735Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésVersió postprint del document publicat a: https://doi.org/10.1007/s11356-013-1557-5Environmental Science and Pollution Research, 2013, vol. 20, p. 5534-5544https://doi.org/10.1007/s11356-013-1557-5(c) Springer Verlag, 2013info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/2277352026-05-27T06:46:51Z
dc.title.none.fl_str_mv Microbial and physicochemical parameters associated with Legionella contamination in hot water recirculation systems
title Microbial and physicochemical parameters associated with Legionella contamination in hot water recirculation systems
spellingShingle Microbial and physicochemical parameters associated with Legionella contamination in hot water recirculation systems
Serrano Suárez, Alejandra
Contaminació microbiana
Legionel·la
Microbiologia aquàtica
Microbial contamination
Legionella
Water microbiology
title_short Microbial and physicochemical parameters associated with Legionella contamination in hot water recirculation systems
title_full Microbial and physicochemical parameters associated with Legionella contamination in hot water recirculation systems
title_fullStr Microbial and physicochemical parameters associated with Legionella contamination in hot water recirculation systems
title_full_unstemmed Microbial and physicochemical parameters associated with Legionella contamination in hot water recirculation systems
title_sort Microbial and physicochemical parameters associated with Legionella contamination in hot water recirculation systems
dc.creator.none.fl_str_mv Serrano Suárez, Alejandra
Dellundé, Jordi
Salvadó i Cabré, Humbert
Cervero Aragó, Sílvia
Méndez Viera, Javier
Canals, Oriol
Blanco, Silvia
Arcas Pons, Antoni
Araujo Boira, Rosa Ma.
author Serrano Suárez, Alejandra
author_facet Serrano Suárez, Alejandra
Dellundé, Jordi
Salvadó i Cabré, Humbert
Cervero Aragó, Sílvia
Méndez Viera, Javier
Canals, Oriol
Blanco, Silvia
Arcas Pons, Antoni
Araujo Boira, Rosa Ma.
author_role author
author2 Dellundé, Jordi
Salvadó i Cabré, Humbert
Cervero Aragó, Sílvia
Méndez Viera, Javier
Canals, Oriol
Blanco, Silvia
Arcas Pons, Antoni
Araujo Boira, Rosa Ma.
author2_role author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Contaminació microbiana
Legionel·la
Microbiologia aquàtica
Microbial contamination
Legionella
Water microbiology
topic Contaminació microbiana
Legionel·la
Microbiologia aquàtica
Microbial contamination
Legionella
Water microbiology
description Hot water recirculation systems (HWRS) in hotels and nursing homes, which are common in countries such as Spain, have been related to outbreaks of legionellosis. To establish the relationships of microbial and physicochemical parameters, especially protozoa, with the occurrence of Legionella in HWRS, 231 samples from hotels and nursing homes were analysed for Legionella, protozoa, heterotrophic plate counts (HPC) at 22 and 37 °C, Pseudomonas, metals, temperature and others. Legionella pneumophila was the dominant species isolated, and 22 % were sg. 1. The sampling method became particularly important in order to define which factors were involved on the occurrence of Legionella. Results showed that the bacteria and the accompanying microbiota were more abundant in the first flush water whose temperature was lower. The bacteria occurred in those samples with high HPC and were inversely correlated with high temperatures. Multivariate regression showed that a concentration above 1× 105CFU/100 mL of HPC at 37 °C, Fe above 0.095 ppm and the presence of protozoa increased significantly the risk of Legionella colonization, while univariant regression showed that the presence of Cu above 0.76 ppm and temperature above 55 °C diminished it. Therefore, to reduce the risk associated with Legionella occurrence in HWRS these parameters should be taken into consideration.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/227735
url https://hdl.handle.net/2445/227735
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Versió postprint del document publicat a: https://doi.org/10.1007/s11356-013-1557-5
Environmental Science and Pollution Research, 2013, vol. 20, p. 5534-5544
https://doi.org/10.1007/s11356-013-1557-5
dc.rights.none.fl_str_mv (c) Springer Verlag, 2013
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Springer Verlag, 2013
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer Verlag
publisher.none.fl_str_mv Springer Verlag
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869416070108938240
score 15,811543

Similares en LA Referencia