Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina

Autores
Córdoba, Maria Alejandra; del Coco, Valeria Fernanda; Minvielle, Marta Cecilia; Basualdo Farjat, Juan Angel
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The objective of this study was to evaluate the influencing factors in the occurrence of coliforms in the drinking water in La Plata (Argentina) from June 1999 to June 2001. A total of 180 samples were collected from Rio de La Plata (102 samples) and Puelche Aquifer (78 samples); 45 samples were collected for each of the four seasons. The membrane filter procedure was used for isolating bacteria, and each sample was tested for chlorine and pH. The highest percentage of samples positive for coliforms in the two tested media was obtained in summer while the highest percentage of negative samples was obtained in winter. No Escherichia coli was isolated. The percentage of injured coliforms fluctuated between 70 and 100%. The most frequently isolated bacteria was Enterobacter cloacae in summer, Enterobacter agglomerans in autumn and Klebsiella oxytoca in winter and spring. Significant correlations were observed between coliforms and the distance from the initial treatment point, and with the level of free chlorine. We conclude that drinking water contamination in La Plata occurs in the distribution system due to increased temperatures and reduced disinfectant levels, which result in bacterial regrowth.
Fil: Córdoba, Maria Alejandra. Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Departamento de Articulación de Ciencias Básicas y Clínicas. Cátedra de Microbiología y Parasitología; Argentina
Fil: del Coco, Valeria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Departamento de Articulación de Ciencias Básicas y Clínicas. Cátedra de Microbiología y Parasitología; Argentina
Fil: Minvielle, Marta Cecilia. Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Departamento de Articulación de Ciencias Básicas y Clínicas. Cátedra de Microbiología y Parasitología; Argentina
Fil: Basualdo Farjat, Juan Angel. Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Departamento de Articulación de Ciencias Básicas y Clínicas. Cátedra de Microbiología y Parasitología; Argentina
Materia
Argentina,
Bacterial regrowth
Disinfectant
Drinking water, temperature
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/242732
Acceder
id CONICETDig_da5e6b3667276da0edc9088bdde0f081
oai_identifier_str oai:ri.conicet.gov.ar:11336/242732
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, ArgentinaCórdoba, Maria Alejandradel Coco, Valeria FernandaMinvielle, Marta CeciliaBasualdo Farjat, Juan AngelArgentina,Bacterial regrowthDisinfectantDrinking water, temperaturehttps://purl.org/becyt/ford/3.3https://purl.org/becyt/ford/3The objective of this study was to evaluate the influencing factors in the occurrence of coliforms in the drinking water in La Plata (Argentina) from June 1999 to June 2001. A total of 180 samples were collected from Rio de La Plata (102 samples) and Puelche Aquifer (78 samples); 45 samples were collected for each of the four seasons. The membrane filter procedure was used for isolating bacteria, and each sample was tested for chlorine and pH. The highest percentage of samples positive for coliforms in the two tested media was obtained in summer while the highest percentage of negative samples was obtained in winter. No Escherichia coli was isolated. The percentage of injured coliforms fluctuated between 70 and 100%. The most frequently isolated bacteria was Enterobacter cloacae in summer, Enterobacter agglomerans in autumn and Klebsiella oxytoca in winter and spring. Significant correlations were observed between coliforms and the distance from the initial treatment point, and with the level of free chlorine. We conclude that drinking water contamination in La Plata occurs in the distribution system due to increased temperatures and reduced disinfectant levels, which result in bacterial regrowth.Fil: Córdoba, Maria Alejandra. Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Departamento de Articulación de Ciencias Básicas y Clínicas. Cátedra de Microbiología y Parasitología; ArgentinaFil: del Coco, Valeria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Departamento de Articulación de Ciencias Básicas y Clínicas. Cátedra de Microbiología y Parasitología; ArgentinaFil: Minvielle, Marta Cecilia. Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Departamento de Articulación de Ciencias Básicas y Clínicas. Cátedra de Microbiología y Parasitología; ArgentinaFil: Basualdo Farjat, Juan Angel. Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Departamento de Articulación de Ciencias Básicas y Clínicas. Cátedra de Microbiología y Parasitología; ArgentinaIWA Publishing2010-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/242732Córdoba, Maria Alejandra; del Coco, Valeria Fernanda; Minvielle, Marta Cecilia; Basualdo Farjat, Juan Angel; Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina; IWA Publishing; Journal of Water and Health; 8; 2; 6-2010; 205-2111477-8920CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://iwaponline.com/jwh/article/8/2/205/365/Influencing-factors-in-the-occurrence-of-injuredinfo:eu-repo/semantics/altIdentifier/doi/10.2166/wh.2009.141info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-12-23T14:56:15Zoai:ri.conicet.gov.ar:11336/242732instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-12-23 14:56:15.527CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina
title Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina
spellingShingle Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina
Córdoba, Maria Alejandra
Argentina,
Bacterial regrowth
Disinfectant
Drinking water, temperature
title_short Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina
title_full Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina
title_fullStr Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina
title_full_unstemmed Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina
title_sort Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina
dc.creator.none.fl_str_mv Córdoba, Maria Alejandra
del Coco, Valeria Fernanda
Minvielle, Marta Cecilia
Basualdo Farjat, Juan Angel
author Córdoba, Maria Alejandra
author_facet Córdoba, Maria Alejandra
del Coco, Valeria Fernanda
Minvielle, Marta Cecilia
Basualdo Farjat, Juan Angel
author_role author
author2 del Coco, Valeria Fernanda
Minvielle, Marta Cecilia
Basualdo Farjat, Juan Angel
author2_role author
author
author
dc.subject.none.fl_str_mv Argentina,
Bacterial regrowth
Disinfectant
Drinking water, temperature
topic Argentina,
Bacterial regrowth
Disinfectant
Drinking water, temperature
purl_subject.fl_str_mv https://purl.org/becyt/ford/3.3
https://purl.org/becyt/ford/3
dc.description.none.fl_txt_mv The objective of this study was to evaluate the influencing factors in the occurrence of coliforms in the drinking water in La Plata (Argentina) from June 1999 to June 2001. A total of 180 samples were collected from Rio de La Plata (102 samples) and Puelche Aquifer (78 samples); 45 samples were collected for each of the four seasons. The membrane filter procedure was used for isolating bacteria, and each sample was tested for chlorine and pH. The highest percentage of samples positive for coliforms in the two tested media was obtained in summer while the highest percentage of negative samples was obtained in winter. No Escherichia coli was isolated. The percentage of injured coliforms fluctuated between 70 and 100%. The most frequently isolated bacteria was Enterobacter cloacae in summer, Enterobacter agglomerans in autumn and Klebsiella oxytoca in winter and spring. Significant correlations were observed between coliforms and the distance from the initial treatment point, and with the level of free chlorine. We conclude that drinking water contamination in La Plata occurs in the distribution system due to increased temperatures and reduced disinfectant levels, which result in bacterial regrowth.
Fil: Córdoba, Maria Alejandra. Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Departamento de Articulación de Ciencias Básicas y Clínicas. Cátedra de Microbiología y Parasitología; Argentina
Fil: del Coco, Valeria Fernanda. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Departamento de Articulación de Ciencias Básicas y Clínicas. Cátedra de Microbiología y Parasitología; Argentina
Fil: Minvielle, Marta Cecilia. Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Departamento de Articulación de Ciencias Básicas y Clínicas. Cátedra de Microbiología y Parasitología; Argentina
Fil: Basualdo Farjat, Juan Angel. Universidad Nacional de La Plata. Facultad de Ciencias Médicas. Departamento de Articulación de Ciencias Básicas y Clínicas. Cátedra de Microbiología y Parasitología; Argentina
description The objective of this study was to evaluate the influencing factors in the occurrence of coliforms in the drinking water in La Plata (Argentina) from June 1999 to June 2001. A total of 180 samples were collected from Rio de La Plata (102 samples) and Puelche Aquifer (78 samples); 45 samples were collected for each of the four seasons. The membrane filter procedure was used for isolating bacteria, and each sample was tested for chlorine and pH. The highest percentage of samples positive for coliforms in the two tested media was obtained in summer while the highest percentage of negative samples was obtained in winter. No Escherichia coli was isolated. The percentage of injured coliforms fluctuated between 70 and 100%. The most frequently isolated bacteria was Enterobacter cloacae in summer, Enterobacter agglomerans in autumn and Klebsiella oxytoca in winter and spring. Significant correlations were observed between coliforms and the distance from the initial treatment point, and with the level of free chlorine. We conclude that drinking water contamination in La Plata occurs in the distribution system due to increased temperatures and reduced disinfectant levels, which result in bacterial regrowth.
publishDate 2010
dc.date.none.fl_str_mv 2010-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/242732
Córdoba, Maria Alejandra; del Coco, Valeria Fernanda; Minvielle, Marta Cecilia; Basualdo Farjat, Juan Angel; Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina; IWA Publishing; Journal of Water and Health; 8; 2; 6-2010; 205-211
1477-8920
CONICET Digital
CONICET
url http://hdl.handle.net/11336/242732
identifier_str_mv Córdoba, Maria Alejandra; del Coco, Valeria Fernanda; Minvielle, Marta Cecilia; Basualdo Farjat, Juan Angel; Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina; IWA Publishing; Journal of Water and Health; 8; 2; 6-2010; 205-211
1477-8920
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://iwaponline.com/jwh/article/8/2/205/365/Influencing-factors-in-the-occurrence-of-injured
info:eu-repo/semantics/altIdentifier/doi/10.2166/wh.2009.141
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv IWA Publishing
publisher.none.fl_str_mv IWA Publishing
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.952241

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