Influence of Freshwater Sediment Characteristics on Persistence of Fecal Indicator Bacteria

Article Article scientifique Article Influence of Freshwater Sediment Characteristics on Persistence of Fecal Indicator Bacteria eng 2009 author Haller Laurence author Amedegnato Essoefli Djidjoe 556624 author Pote-Wembonyama John 0000-0003-4091-749X 525637 author Wildi Walter 22744 217-227 10.1007/s11270-009-0005-0 0049-6979 http://link.springer.com/10.1007/s11270-009-0005-0 Extended persistence of enteric bacteria in coastal sediments and potential remobilization of pathogens during natural turbulence or human activities may induce an increased risk of human infections. In this study, the effect of sediment characteristics such as particle grain size and nutrient and organic matter contents on the survival of fecal indicator bacteria (FIB) including total coliforms, Escherichia coli, and Enterococcus was investigated. The experimentation was carried out for 50 days in microcosms containing lake water and different contaminated freshwater sediments in continuous-flow and batch conditions. Results of this study revealed: (1) extended FIB survival in sediments up to 50 days, (2) higher growth and lower decay rates of FIB in sediments with high levels of organic matter and nutrients and small (mainly silt) grain size, and (3) longer survival of Enterococcus sp. compared to E. coli and total coliforms. FIB survival in sediments and possible resuspension are of considerable significance for the understanding of permanent microbial pollution in water column and therefore human risk during recreational activities. Fecal indicator bacteria Sediments Organic matter Nutrients Survival Human health risk Dewey 550 Open Access - Licence nationale Springer 41 Département F.-A. Forel des sciences de l'environnement et de l'eau 153 false Water, air and soil pollution 203 1-4 f4982527-d140-4dcc-9ab3-8f705e88c137 Article (Published version) Public art%3A10.1007%2Fs11270-009-0005-0.pdf 315251 application/pdf openAccess Faculté des sciences / Section des sciences de la Terre et de l'Environnement / Département F.-A. Forel des sciences de l'environnement et de l'eau

Title	Published in	Access level	OA Policy	Year	Views	Downloads

Influence of Freshwater Sediment Characteristics on Persistence of Fecal Indicator Bacteria	Water, air and soil pollution			2009	546	484

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Amedegnato, Essoefli Djidjoe