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Registros recuperados: 6
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Epidémiologie moléculaire des espèces Marteilia en Europe ArchiMer
Le Roux, Frédérique; Audemard, Corinne; Cochennec, Nathalie; Thebault, Anne; Berthe, Franck.
Responsible for massive epizootics, the Marteilia type parasites are very dangerous infectious agents for oysters. As a matter of fact, in France the spreading out of the parasitosis caused by Marteilia refringens disturbed dangerously the flat oyster, Ostrea edulis, production; destroying a large percentage of the farms on the Atlantic coast. The fight against marteiliose implies a good management of the contamination risk, that is to say the identification of the parasite(s), the characterization of the host(s), vector(s) or reservoir(s) and the understanding of the parasite's transmission mode.
Tipo: Text Palavras-chave: Bivalves; Biologie Moléculaire; Marteilia refringens; Epidémiologie.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/acte-3271.pdf
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Implication d'hôtes bentho-pélagiques dans le cycle de Marteilia refringens parasite de l'huître plate Ostrea edulis: mise en place d'outils de détection et de validation de sa présence chez des hôtes potentiels ArchiMer
Audemard, Corinne.
L'huître plate, Ostrea edulis a subit depuis les années 1970 deux graves épizooties provoquées par les parasites protozoaires, Bonamia ostreae et Marteilia refringens. Si, pour le premier de ces parasites, des huîtres plates tolérantes ont pu être sélectionnées, la marteiliose ne peut être contrôlée que par une gestion du risque de contamination. Dans ce cadre, la connaissance du cycle parasitaire de Marteilia refringens est primordiale. Les travaux réalisés à ce sujet ont permis de poser l'hypothèse d'un cycle hétéroxène. Au cours de notre étude la recherche du parasite a été effectuée sur des espèces du zooplancton, de la méiofaune et de la macrofaune prélevées au sein d'un biotope sélectif, les claires ostréicoles. Le parasite a été recherché par la...
Tipo: Text
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00426/53786/54686.pdf
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Infection dynamics of Marteilia refringens in flat oyster Ostrea edulis and copepod Paracartia grani in a claire pond of Marennes-Oleron Bay ArchiMer
Audemard, Corinne; Sajus, Marie-céline; Barnaud, Antoine; Sautour, Benoît; Sauriau, Pierre-guy; Berthe, Franck.
The protozoan parasite Marteilia refringens has been partly responsible for the severe decrease in the production of the European flat oyster Ostrea edulis Linnaeus in France since the 1970s. The calanoid copepod Paracartia grani Sars was recently found to be a host for M refringens in French shallow-water oyster ponds ('claires'). This study reconsidered M refringens transmission dynamics in the light of this finding, taking into account not only oyster infection dynamics and environmental factors but also data concerning the copepod host. P. grani population dynamics in the claire under study revealed that this species is the dominant planktonic copepod in this confined ecosystem. During winter, M refringens overwintered in O. edulis, with P. grani...
Tipo: Text Palavras-chave: Claire pond; Infection dynamics; Paracartia grani; Ostrea edulis; Marteilia refringens.
Ano: 2004 URL: http://archimer.ifremer.fr/doc/2004/publication-2858.pdf
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Needle in a haystack: involvement of the copepod Paracartia grani, in the life-cycle of the oyster pathogen Marteilia refringens ArchiMer
Audemard, Corinne; Le Roux, Frédérique; Barnaud, Antoine; Collins, Catherine; Sautour, B; Sauriau, Pierre-guy; De Montaudouin, X; Coustau, C; Combes, C; Berthe, Franck.
Marteilia refringens is a major pathogen of the European flat oyster, Ostrea edulis Linnaeus. Since its description, the lifecycle of this protozoan parasite has eluded discovery. Attempts to infect oysters experimentally have been unsuccessful and led to the hypothesis of a complex life-cycle involving several hosts. Knowledge of this life-cycle is of central importance in order to manage oyster disease. However, the exploration of M. refringens life-cycle has been previously limited by the detection tools available and the tremendous number of species to be screened in enzootic areas. In this study, these two restrictions were circumvented by the use of both molecular detection tools and a mesocosm with low biodiversity. Screening of the entire fauna of...
Tipo: Text Palavras-chave: Experimental transmission; In situ hybridization; PCR; Paracartia grani; Ostrea edulis; Marteilia refringens.
Ano: 2002 URL: http://archimer.ifremer.fr/doc/2002/publication-2778.pdf
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Pipetman et bottes en caoutchouc à la recherche d'hôte(s) de Marteilia refringens ArchiMer
Audemard, Corinne; Le Roux, Frédérique; Sauriau, Pierre-guy; Sautour, Benoît; Combes, C.; Coustau, C.; Blachier, Philippe; Berthe, Franck.
Over the last thirty years, the French production of flat oyster Ostrea edulis dropped from15,000 tons/year to 1,500 tons. Marteilia refringens, a parasite of the flat oyster's digestive gland, is partly responsible for this drop. The fight against this pathogen agent requires a better knowledge of its parasitic cycle. The main hypothesis is the existence of a heteroxenous cycle, that is to say a cycle involving more than one host. However, for thirty years this or these hosts have not been found, and the cycle of Marteilia refringens remains unknown.
Tipo: Text Palavras-chave: Claires ostréicoles; Parasite; Détection; Biologie moléculaire; Marteilia refringens.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/acte-3272.pdf
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Stratégie d'utilisation de différentes espèces animales par le parasite Marteilia refringens pour assurer son cycle biologique ArchiMer
Audemard, Corinne.
Au cours des trente dernières années, la production française d 'huître plate Ostrea edulis est passée de 30 000 tonnes par an à seulement 1 500 tonnes actuellement. Le parasite de la glande digestive de l'huître plate, Marteilia refringens, est en partie responsable de cette chute de production. La gestion des risques liés au développement de cette maladie en zone endémique, nécessite la mise en évidence des compartiments fonctionnels de ce cycle parasitaire. Les travaux antérieurs ont montré que le cycle de M. refringens était vraisemblablement hétéroxène, cependant cette hypothèse n'avait jamais pu être démontrée, limitant cette gestion. La recherche d'hôtes de M. refringens a pu être réalisée par l'application d'outils de biologie moléculaire (PCR et...
Tipo: Text Palavras-chave: Pathologie des mollusques; Marteilia refringens; Ostrea edulis; Paracartia grani; Cycle de vie; Outils de biologie moléculaire; Modèle d'étude.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/00107/21850/19440.pdf
Registros recuperados: 6
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