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Acceptabilité du milieu - rade de Brest. Etude des suspensions au microscope électronique à balayage et à la microsonde (sédimentologie et microbiologie) ArchiMer
Bassoulet, Philippe; Pommepuy, Monique; Cormier, Michel.
Dans le programme "Acceptabilité du Milieu -Rade de Brest" on observe une décroissance des concentrations bactériennes des émissaires vers le large.
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Ano: 1980 URL: http://archimer.ifremer.fr/doc/00048/15948/13378.pdf
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Étude de la capacité de toxicogenèse de la souche d'Escherichia coli H10407 introduite en eau de mer synthétique ArchiMer
Jolivet Gougeon, Anne; Tamanai Shacoori, Zohreh; Pommepuy, Monique; Cormier, Michel.
Survival of Escherichia coli H10407 strain, introduced into artificial seawater during exponential and stationary growth phases, was studied for seven days. Pathogenicity of stressed bacteria in these conditions was estimated by detection of the thermolabile toxin LT (excreted in situ in artificial seawater) and the elt-coding gene (always detected). Emergence of viable but non-culturable bacteria appeared as an important stage in the pathogenic evolution of this strain; resuscitation experiments were attempted to confirm the expression of the elt-gene of virulence. This resuscitation was only possible during the first two or three days after stress when the bacteria are still virulent. More than three days after the stress, the bacteria were not able to...
Tipo: Text Palavras-chave: Bactéries viables non cultivables; Gène elt; Digoxigénine; PCR; Escherichia coli entérotoxinogènes (ETEC); Viable non culturable bacteria; Elt gene; Digoxigenin; PCR; Enterotoxigenic Escherichia coli ETEC.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/publication-524.pdf
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Étude de la flore bactérienne d'un estuaire breton (Élorn, rade de Brest, France) ArchiMer
Pommepuy, Monique; Cormier, Michel; Brunel, Laurence; Breton, Marguerite.
The purpose of this study is to evaluate the behaviour of the bacterial flora of a macrotidal estuary, originating from different sources: the Elorn freshwater river, a sewage treatment plant (STP), and the sediment. Viable counts were done using severa} culture media in order to determine where bacteria originated. Principal component analysis showed that the estuary was subjected to two well-defined conditions. On the one band, during periods of low turbulence (neap tide), resuspension of bottom sediments did not occur. Bacterial flora decreased from the upper reaches of the estuary to its lower part, coming mainly from two sources (river and STP). As a function of salinity variations, bacterial flora showed a progressive increase of the endogeneous...
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Ano: 1987 URL: http://archimer.ifremer.fr/doc/00109/22069/19711.pdf
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Présence du genre Listeria dans les coquillages issus de zones conchylicoles du Finistère ArchiMer
Monfort, Patrick; Piclet, Guy; Le Naour, Gwenael; Le Saux, Jean-claude; Raguenes, Pierre; Boulben, Sylviane; Le Gal, Dominique; Minet, Jacques; Venien, Jacqueline; Cormier, Michel; Plusquellec, Alain.
Cette étude a porté sur la recherche des bactéries appartenant au genre Listeria (Listeria spp.) dans 61 échantillons de coquillages issus de quelques zones de production situées dans le département du Finistère. Ces investigations, effectuées au cours de deux périodes (janvier-février et juillet -août 1994), ont mis en évidence la présence régulière des Listeria dans les bivalves (L. spp.= 49.2% ), la part non négligeable de Listeria monocytogenes (L.m. = 11.5%), la multiplicité d'espèces sur quelques échantillons testés (Baie de Morlaix) ainsi qu'une large distribution de ce genre bactérien. Par ailleurs, il est démontré une incidence saisonnière,la période hivernale se révélant la plus critique. Cette information, intéressante sur le plan sanitaire,...
Tipo: Text Palavras-chave: Listeria; Bactéries pathogènes; Coquillages; Produits marins; Estuaires; Listeria; Pathogenic bacteria; Shellfishes; Seafood products; Estuaries.
Ano: 1995 URL: http://archimer.ifremer.fr/doc/00104/21555/19134.pdf
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