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Bivalve aquaculture is seriously affected by many bacterial pathogens that cause high losses in hatcheries as well as in natural beds. A number of Vibrio species, but also members of the genera Nocardia and Roseovarius, are considered important pathogens in aquaculture. The present work provides an...Contributeur (s):
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Bechemin, Christian / Soletchnik, Patrick / Polsenaere, Pierre / Le Moine, Olivier / Pernet, Fabrice / Protat, Martin / Fuhrmann, Marine / Quere, Claudie / Goulitquer, Sophie / Corporeau, Charlotte / Lapegue, Sylvie / Travers, Marie-agnes / Morga, Benjamin / Garrigues, Manon / Garcia, Celine / Haffner, Philippe / Dubreuil, Christine / Faury, Nicole / Baillon, Laury / Baud, Jean-pierre / Renault, Tristan - 2015Mass mortality outbreaks (90-100%) in both juvenile and adult blue mussels were reported in 2014 along the Pertuis Charentais area of the French Atlantic coast. A series of studies were carried out to learn more about the phenomenon through detecting pathogens, describing environmental conditions...Contributeur (s):
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Mersni-achour, Rachida / Ben Cheikh, Yosra / Pichereau, Vianney / Doghri, Ibtissem / Etien, Cedric / Degremont, Lionel / Saulnier, Denis / Fruitier-arnaudin, Ingrid / Travers, Marie-agnes - 2015Vibrio tubiashii is a marine pathogen isolated from larval and juvenile bivalve molluscs causing bacillary necrosis. Recent studies demonstrated the isolation of this species in a French experimental hatchery/nursery affecting Crassostrea gigas spat in 2007. Here, using larvae of C. gigas as an...Contributeur (s):
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Segarra, Amelie / Faury, Nicole / Haffner, Philippe / Pepin, Jean-francois / Tourbiez, Delphine / Trancart, Suzanne / Travers, Marie-agnes / Renault, Tristan - 2012Le premier cas d'infection à virus de type herpès a été rapporté en 1972, aux Etats Unis, chez l'huître américaine, Crassostrea virginica (Farley et al, 1972). A partir de 1991, des mortalités massives associées à la détection de virus de type herpes ont été observées chez plusieurs...Contributeur (s):
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Travers, Marie-agnes / Mersni Achour, Rachida / Haffner, Philippe / Tourbiez, Delphine / Cassone, Anne-laure / Morga, Benjamin / Doghri, Ibtissem / Garcia, Celine / Renault, Tristan / Fruitier-arnaudin, Ingrid / Saulnier, Denis - 2014Nine dominant bacterial isolates were obtained from different batches of Crassostrea gigas spat experiencing high mortality rates in a French experimental hatchery/nursery in 2007. Using phenotypic analysis combined with multilocus sequence analysis, the isolates were shown to be genetically close...Contributeur (s):
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Bechemin, Christian / Soletchnik, Patrick / Polsenaere, Pierre / Le Moine, Olivier / Pernet, Fabrice / Protat, Martin / Fuhrmann, Marine / Quere, Claudie / Goulitquer, Sophie / Corporeau, Charlotte / Renault, Tristan / Lapegue, Sylvie / Travers, Marie-agnes / Morga, Benjamin / Garriques, Manon / Garcia, Celine / Haffner, Philippe / Dubreuil, Christine / Faury, Nicole / Baillon, Laury / Baud, Jean-pierre - 2014Suite aux surmortalités observées au sein des élevages de moules touchant à la fois les animaux adultes et les juvéniles au mois de mars, dans les Pertuis Charentais, la Direction Générale de l’Alimentation (DGAl) a adressé une saisine à Ifremer le 04 avril 2014. Celle-ci fait état d’une demande d’...Contributeur (s):
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Moreau, Pierrick / Moreau, Kevin / Segarra, Amelie / Tourbiez, Delphine / Travers, Marie-agnes / Rubinsztein, David C. / Renault, Tristan - 2015Recent mass mortality outbreaks around the world in Pacific oysters, Crassostrea gigas, have seriously affected the aquaculture economy. Although the causes for these mortality outbreaks appear complex, infectious agents are involved. Two pathogens are associated with mass mortality outbreaks, the...Contributeur (s):
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Pepin, Jean-francois / Travers, Marie-agnes - 2016Durant l’hiver 2014 jusqu’à mai 2014, des mortalités exceptionnelles (50-100%) ont affectées la moule bleue, Mytilus edulis dans les Pertuis Charentais (principalement secteur du Pertuis Breton) et en Vendée. A la demande du Ministère (DPMA) une expertise environnementale a été demandée à l’Ifremer...Contributeur (s):
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Pepin, Jean-francois / Benabdelmouna, Abdellah / Degremont, Lionel / Guesdon, Stephane / Le Moine, Olivier / Morga, Benjamin / Bierne, Nicolas / Travers, Marie-agnes / Robert, Stephane / Soletchnik, Patrick - 2017Depuis 2014, des épisodes de mortalité anormale affectent les cheptels mytilicoles tant adultes que juvéniles. Dès l’année 2015, une première année d’étude a été réalisée au travers de l’action MORBLEU (Mortalité des moules Bleues). Elle a été menée dans les Pertuis charentais et la baie de...Contributeur (s):
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Degremont, Lionel / Maurouard, Elise / Godfrin, Yoann / Travers, Marie-agnes / Morga, Benjamin / Lamy, Jean-baptiste / Benabdelmouna, Abdellah - 2017Depuis 2012, le nombre de cas de mortalités d’huîtres creuses adultes (Crassostrea gigas) rapportés dans le cadre des réseaux de surveillance de l’Ifremer, et dans lesquels la bactérie Vibrio aestuarianus a été isolée, a fortement augmenté. Les objectifs de cette étude étaient (1) d’étudier la...Contributeur (s):
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Travers, Marie-agnes / Tourbiez, Delphine / Parizadeh, Leila / Haffner, Philippe / Kozic-djellouli, Angelique / Aboubaker, Mohamed / Koken, Marcel / Degremont, Lionel / Lupo, Coralie - 2017This study investigated oyster infection dynamics by different strains of Vibrio aestuarianus isolated before and after the apparent re-emergence of this pathogen observed in France in 2011. We conducted experiments to compare minimal infective dose, lethal dose 50 and bacterial shedding for six V...Contributeur (s):
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Degremont, Lionel / Lamy, Jean-baptiste / Pepin, Jean-francois / Travers, Marie-agnes / Renault, Tristan - 2015The Pacific oyster, Crassostrea gigas, is the most important commercial oyster species cultivated in the world. Meanwhile, the ostreid herpesvirus 1 (OsHV-1) is one of the major pathogens affecting the Pacific oyster, and numerous mortality outbreaks related to this pathogen are now reported...Contributeur (s):
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Segarra, Amelie / Mauduit, Florian / Faury, Nicole / Trancart, Suzanne / Degremont, Lionel / Tourbiez, Delphine / Haffner, Philippe / Barbosa-solomieu, Valerie / Pepin, Jean-francois / Travers, Marie-agnes / Renault, Tristan - 2014Background: Massive mortality outbreaks affecting Pacific oyster (Crassostrea gigas) spat in various countries have been associated with the detection of a herpesvirus called ostreid herpesvirus type 1 (OsHV-1). However, few studies have been performed to understand and follow viral gene...Contributeur (s):
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Travers, Marie-agnes / Sow, Cisse / Zirah, Severine / Deregnaucourt, Christiane / Chaouch, Soraya / Queiroz, Rayner M. L. / Charneau, Sebastien / Allain, Thibault / Florent, Isabelle / Grellier, Philippe - 2016Giardiasis, currently considered a neglected disease, is caused by the intestinal protozoan parasite Giardia duodenalis and is widely spread in human as well as domestic and wild animals. The lack of appropriate medications and the spread of resistant parasite strains urgently call for the...Contributeur (s):
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Ben Henda, Yesmine / Laamari, Mariem / Lanneluc, Isabelle / Travers, Marie-agnes / Agogue, Helene / Arnaudin, Ingrid / Bridiau, Nicolas / Maugard, Thierry / Piot, Jean-marie / Sannier, Frederic / Bordenave-juchereau, Stephanie - 2015The effect of 11 marine-derived cryptides was investigated on proliferation, differentiation and maturation of human white pre-adipocytes (HWP). They were all formerly identified as potent Angiotensin-Converting-Enzyme inhibitors.Val-Trp (VW),Val-Tyr (VY), Lys-Tyr (KY), Lys-Trp (KW), Ile-Tyr (IY),...Contributeur (s):