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Microbial impact of small tributaries on water and shellfish quality in shallow coastal areas ArchiMer
Riou, Philippe; Le Saux, Jean-claude; Dumas, Franck; Caprais, Marie-paule; Le Guyader, Soizick; Pommepuy, Monique.
This study aimed to investigate the impact of small tributaries on seawater and shellfish quality in coastal area subjected to brief episodes leading to fecal contamination. Escherichia coli and F-RNA-specific bacteriophages were selected as fecal indicators and astroviruses were chosen as being representative of pathogens in the human population during winter viral epidemics. A two-dimensional hydrodynamic model was built to simulate the current and dispersion in the model domain, which includes areas uncovered at low tide. The model also includes decay rates to simulate microorganism behavior and assess the influence of fecal input on shellfish quality. The originality lies in the fact that specific features of the study area were considered. Modeling...
Tipo: Text Palavras-chave: Shellfish; Astrovirus; F RNA specific; E. coli; Seawater fecal contamination; Modeling.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2675.pdf
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The role of models in assessing the impact of sewage overflows on feacal water contamination ArchiMer
Riou, Philippe; Le Saux, Jean-claude; Dumas, Franck; Le Guyader, Soizick; Le Goff, R.; Maheux, Frank; Lamort, Laure; Pommepuy, Monique.
Climate change contributes to local weather modifications such as storm events and heavy rainfall, and in particular, changes in the frequency and intensity of extreme storm and rainfall events. Observations have indicated that rainfall-runoff processes, like sewage overflow may induce fecal contamination in coastal water. Pathogens present in runoff water could therefore contaminate shellfish and be responsible for food-borne disease outbreaks. Mathematical models for this were used to predict the effect of climate modifications on shellfish quality. Using a hydrodynamic model, simulations of water quality conditions under a variety of storm event scenarios were run and are presented here for a harvesting area in France. Major storm events occurring in...
Tipo: Text Palavras-chave: Modeling; Seawater fecal contamination; E. coli; Virus; Shellfish; Climate change.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/00066/17739/15261.pdf
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