Consulta: creatorFacets:"Pourcher, A. M."
Registros recuperados: 3
Data/hora: 01/06/2024 00:36:48

Origin of fecal contamination in waters from contrasted areas: Stanols as Microbial Source Tracking markers
Provedor de dados: 5
Autores: Derrien, M.; Jarde, E.; Gruau, G.; Pourcher, A. M.; Gourmelon, Michele; Jadas-hecart, Alain; Wickmann, A. C. Pierson.
Improving the microbiological quality of coastal and river waters relies on the development of reliable markers that are capable of determining sources of fecal pollution. Recently, a principal component analysis (PCA) method based on six stanol compounds (i.e. 5 beta-cholestan-3 beta-ol (coprostanol), 5 beta-cholestan-3 alpha-ol (epicoprostanol), 24-methyl-5 alpha-cholestan-3 beta-ol (campestanol), 24-ethyl-5 alpha-cholestan-3 beta-ol (sitostanol), 24-ethyl-5 beta-cholestan-3 beta-ol (24-ethylcoprostanol) and 24-ethyl-5 beta-cholestan-3 alpha-ol (24-ethylepicoprostanol)) was shown to be suitable for distinguishing between porcine and bovine feces. In this study, we tested if this PCA method, using the above six stanols, could be used as a tool in...
Tipo: Text
Palavras-chave: Stanols; Microbial Source Tracking; Principal component analysis; Microbial markers.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00090/20133/17829.pdf

Development of microbial and chemical MST tools to identify the origin of the faecal pollution in bathing and shellfish harvesting waters in France
Provedor de dados: 5
Autores: Gourmelon, Michele; Caprais, Marie-paule; Mieszkin, Sophie; Marti, Romain; Wery, Nathalie; Jarde, E.; Derrien, Marc; Jadas-hecart, A.; Communal, P. Y.; Jaffrezic, A.; Pourcher, A. M.
The microbiological quality of coastal or river waters can be affected by faecal pollution from human or animal sources. An efficient MST (Microbial Source Tracking) toolbox consisting of several host-specific markers would therefore be valuable for identifying the origin of the faecal pollution in the environment and thus for effective resource management and remediation. In this multidisciplinary study, after having tested some MST markers on faecal samples, we compared a selection of 17 parameters corresponding to chemical (steroid ratios, caffeine, and synthetic compounds), bacterial (host-specific Bacteroidales, Lactobacillus amylovorus and Bifidobacterium adolescentis) and viral (genotypes I-IV of F-specific bacteriophages, FRNAPH) markers on...
Tipo: Text
Palavras-chave: Microbial source tracking; Faecal pollution; Bacteroidales; Bifidobacterium adolescentis; Lactobacillus; FRNA bacteriophages; Steroids; Caffeine.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00016/12710/9690.pdf

Persistence of microbial and chemical pig manure markers as compared to faecal indicator bacteria survival in freshwater and seawater microcosms
Provedor de dados: 5
Autores: Solecki, O.; Jeanneau, L.; Jarde, E.; Gourmelon, Michele; Marin, Charlotte; Pourcher, A. M.
Natural seawater and freshwater microcosms inoculated with pig manure were set up to determine the persistence of pig faecal microbial and chemical markers in these two types of surface water. The concentrations of Lactobacillus amylovorus, the Bacteroidales Pig-2-Bac 165 rRNA genetic marker, five stanols and the evolution of two ratios of stanols, R(1) (coprostanol to the sum of coprostanol and 24-ethylcoprostanol) and R(2) (sitostanol to coprostanol) were analyzed during two months along with the concentration of Faecal Indicator Bacteria (FIB). Pig manure was inoculated to unfiltered water microcosms incubated aerobically at 18 degrees C in the dark. The faecal contamination load represented by the concentrations of culturable Escherichia coli and/or...
Tipo: Text
Palavras-chave: Faecal source tracking; Decay rates; Faecal stanols; Biphasic kinetic; Lactobacillus amylovorus; Bacteroidales marker.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00043/15417/12975.pdf