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

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 col...

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Autores principales: Córdoba, María Alejandra, Del Coco, Valeria Fernanda, Minvielle, Marta Cecilia, Basualdo Farjat, Juan Ángel
Formato: Articulo
Lenguaje:Inglés
Publicado: 2010
Materias:
Ciencias Médicas
La Plata (Buenos Aires, Argentina)
Agua Potable
Calidad del Agua
Parasitología
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/5513
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-5513
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Médicas
La Plata (Buenos Aires, Argentina)
Agua Potable
Calidad del Agua
Parasitología
spellingShingle Ciencias Médicas
La Plata (Buenos Aires, Argentina)
Agua Potable
Calidad del Agua
Parasitología
Córdoba, María Alejandra
Del Coco, Valeria Fernanda
Minvielle, Marta Cecilia
Basualdo Farjat, Juan Ángel
Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina
topic_facet Ciencias Médicas
La Plata (Buenos Aires, Argentina)
Agua Potable
Calidad del Agua
Parasitología
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.
format Articulo
Articulo
author Córdoba, María Alejandra
Del Coco, Valeria Fernanda
Minvielle, Marta Cecilia
Basualdo Farjat, Juan Ángel
author_facet Córdoba, María Alejandra
Del Coco, Valeria Fernanda
Minvielle, Marta Cecilia
Basualdo Farjat, Juan Ángel
author_sort Córdoba, María Alejandra
title Influencing factors in the occurrence of injured coliforms in the drinking water distribution system in the city of La Plata, Argentina
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
publishDate 2010
url http://sedici.unlp.edu.ar/handle/10915/5513
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