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Clustering of water bodies in unpolluted and polluted environments based on Escherichia coli phylogroup abundance using a simple interaction database Genet. Mol. Biol.
Stoppe,Nancy de Castro; Silva,Juliana Saragiotto; Torres,Tatiana Teixeira; Carlos,Camila; Hachich,Elayse Maria; Sato,Maria Inês Zanoli; Saraiva,Antonio Mauro; Ottoboni,Laura Maria Mariscal.
Different types of water bodies, including lakes, streams, and coastal marine waters, are often susceptible to fecal contamination from a range of point and nonpoint sources, and have been evaluated using fecal indicator microorganisms. The most commonly used fecal indicator is Escherichia coli, but traditional cultivation methods do not allow discrimination of the source of pollution. The use of triplex PCR offers an approach that is fast and inexpensive, and here enabled the identification of phylogroups. The phylogenetic distribution of E. coli subgroups isolated from water samples revealed higher frequencies of subgroups A1 and B2(3) in rivers impacted by human pollution sources, while subgroups D1 and D2 were associated with pristine sites, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: E. coli; Phylogenetic groups; Pollution sources; Interaction networks; Social network analysis.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572014000500012
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Sanitary quality of sands from marine recreational beaches of São Paulo, Brazil BJM
Sato,Maria Inês Zanoli; Di Bari,Marisa; Lamparelli,Claudia Condé; Truzzi,Ana Cristina; Coelho,Maria Cristina L.S.; Hachich,Elayse Maria.
A sanitary evaluation of sand and water from 16 beaches of São Paulo State, Brazil, was undertaken during spring of 1997 and summer of 1998. Ninety six samples each of wet and dry sand and seawater were collected and analysed for fecal indicator bacteria. A parasitological examination and Candida albicans analysis were also performed in sand samples and F-specific bacteriophages were determined in seawater. Statistical analysis of the results demonstrated higher concentrations of fecal coliforms and fecal streptococci in dry sand during summer. Correlation analysis indicated a significant relationship between fecal indicator densities in wet sand and seawater. There was a significant correlation between the densities of fecal coliforms and fecal...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sand; Seawater; Recreational areas; Fecal indicators; Microbiological criteria.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000400003
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