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Registros recuperados: 32
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Impact de l'Erika sur la pathologie de bivalves d'intérêt commercial: résultats préliminaires ArchiMer
Thebault, Anne; Robert, Maeva; Renault, Tristan; Dumais, M.; Goulletquer, Philippe.
Après le naufrage de l'Erika, la question s'est rapidement posée de l'impact des hydrocarbures sur la santé des coquillages, car la pollution concernait des zones de production conchylicoles. Le suivi zoosanitaire en place dans ces zones permettait d'avoir des données de référence avant impact. Il a été choisi différents sites exposés de référence, qui ont fait l'objet d'analyse en toxicologie et en pathologie. A la différence du cas de l'Arnoco Cadiz, l'effort n'a pas été mis uniquement sur les huîtres mais aussi sur d'autres espèces de coquillages, comme les moules et des fouisseurs, particulièrement exposés comme les coques et les palourdes. La mesure de l'exposition effectuée par la Direction de l'Environnement Littoral (MONERlKA) montre qu'une...
Tipo: Text Palavras-chave: Pollution; Pathologie; Hydrocarbures; Coquillages; HAP; Histologie; Finistère; Vendée.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/00087/19826/17468.pdf
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Shellfish monitoring for lipophilic phycotoxins in France, recommendation for an updated sampling strategy ArchiMer
Thebault, Anne; Arnich, Nathalie; Belin, Catherine; Neaud-masson, Nadine.
In France, the sampling strategy for the official monitoring of lipophilic phycotoxins in bivalve shellfish relies on the definition of risk areas and high risk periods, during which a systematic weekly analysis of toxins in shellfish is performed. Since 2010, high risk periods are defined as follows: the occurrence of one result above the European regulatory limit (160 μg equivalent okadaic acid/kg shellfish) over the last 3 years leads to that month being considered a high risk period. This definition was established according to a statistical analysis of the official monitoring results for the period 2003-2008, based on the mouse bioassay (MBA) as the official analytical method. As of the 1st January 2010, the MBA has been replaced by LC-MS/MS. In 2014,...
Tipo: Text Palavras-chave: Monitoring; Shellfish; Lipophilic phycotoxins; Bayesian inference.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00393/50470/51205.pdf
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Les mortalités d'ormeaux en Bretagne et Normandie : mise en évidence de l'agent causal ArchiMer
Basuyaux, Olivier; Nicolas, Jean-louis; Mazurie, Joseph; Thebault, Anne.
In summer 1997, massive abalone Haliotis tuberculata mortalities are monitored on the coast of Brittany, near Concarneau. They then spread out to the north of Brittany (1998) and to the Norman-Breton Bay in 1999. 60 to 80 % of the abalone populations died without any noticeable symptoms. In 1999, these mortalities reached cultivated abalones at the SMEL hatchery (Blainville). A septicemic bacteria was isolated from every organ (muscle, mucus gland, haemolymph ...) collected from abalones that had just died.
Tipo: Text Palavras-chave: Haliotis tuberculata; Ormeaux; Pathologie; Mortalités.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/acte-3276.pdf
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Contrat de Plan Etat Région Poitou-Charentes 1994-1998. Convention 97 RPC R 58 - Programme Pathologie - Rapport Scientifique année 1997 ArchiMer
Renault, Tristan; Berthe, Franck; Thebault, Anne; Lipart, Cecile; Chollet, Bruno; Haffner, Philippe; Cochennec, Nathalie.
Le but de ce programme pathologie est de rechercher et d'étudier les agents pathogènes connus et inconnus chez les mollusques bivalves marins, plus particulièrement chez l'huître creuse, Crassostrea gigas, afin d'identifier d'éventuels agents causant des mortalités, de proposer des mesures prophylactiques et de définir des conditions zootechniques permettant aux professionnels de limiter l'impact des maladies sur leur cheptel. La présence de maladies, chez les mollusques bivalves marins dont l'impact socio économique peut être catastrophique pour les productions conchylicoles, et l'accroissement des échanges de produits d'aquaculture entre les pays de la CEE et avec les pays tiers nécessitent le renforcement des recherches dans les domaines de la...
Tipo: Text Palavras-chave: Pathologie; Pathogènes; Virus; Herpès virus; Crassostrea gigas; Diagnostic; Herpesviridae.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/00043/15454/12829.pdf
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Etude épidémiologique et écopathologique dans le cadre des mortalités de naissains d'huîtres creuses, Crassostrea gigas ArchiMer
Gaussem, Florian; Thebault, Anne; Mazurie, Joseph; Stanisiere, Jean-yves; Cuzzucoli, Diane; Cochennec-laureau, Nathalie.
Dans le cadre d’une convention Ifremer-DGAL (2010-2011), une étude épidémiologique et écopathologique intégrative a été conduite en Rivière de Pénerf (Morbihan). Elle a permis de mettre en place un outil d’objectivation pour i) l’évaluation des mortalités par une enquête réalisée auprès de tous les professionnels et pour ii) l’acquisition de données sur la biomasse, les stocks présents (élevés et non élevés) et la bathymétrie du site. Une régression logistique multivariée a permis d’ajuster la relation entre ces variables explicatives et d’étudier toutes leurs combinaisons pour comprendre les différences de mortalité déclarées sur les lots de naissains analysés. Le meilleur modèle prend en compte l’origine du naissain (écloserie, naturel), la date de...
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Ano: 2012 URL: http://archimer.ifremer.fr/doc/00119/22996/20827.pdf
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Experimental transmission of Marteilia refringens with special consideration of its life cycle ArchiMer
Berthe, Franck; Pernas, Maria; Zerabib, Maamar; Haffner, Philippe; Thebault, Anne; Figueras, Antonio.
Ever since its first description the paramyxean parasite Marteilia refringens has been recognised as one of the most significant pathogens of bivalve molluscs. The existence of a complex life cycle has been postulated by many authors. However, the transmission route of M. refringens and its life cycle remain unresolved. Experimental observations are presented here that may help lead to a satisfactory hypothesis of the M. refringens life cycle. Trials were performed to test the infectivity of purified early and late stages of M. refringens by different routes of inoculation. Horizontal transmission was also tested by cohabitation with carriers in experimental tanks. Field cohabitation and exposure to natural sources of the parasite helped examine the role...
Tipo: Text Palavras-chave: Marteilia refringens; Ostrea edulis; Transmission trial.
Ano: 1998 URL: https://archimer.ifremer.fr/doc/1998/publication-2742.pdf
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Validation of in situ hybridisation and histology assays for the detection of the oyster parasite Marteilia refringens ArchiMer
Thebault, Anne; Bergman, S; Pouillot, R; Le Roux, Frédérique; Berthe, Franck.
An in situ hybridisation technique has been developed for the detection of infection in oysters with Marteilia refringens with particular emphasis on light infections or confirmation of suspected cases by means of histology. Although validation of new diagnostic methods is usually achieved by comparison with standard techniques, in our case the sensitivity and specificity of the standard (histology) had not previously been established. Another point to consider is that surveillance and monitoring frequently target populations displaying different levels of prevalence under different field conditions. The objective of our study was to evaluate the sensitivity and specificity values of in situ hybridisation and histology for the detection of M refringens,...
Tipo: Text Palavras-chave: Ostrea edulis; Marteilia refringens; Latent models; Specificity; Sensitivity; Validation; Diagnostic.
Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-3624.pdf
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Epidemiovigilance dans le cas de mortalités anormales de coquillages : exemple des coques du Croizic ArchiMer
Thebault, Anne.
Detection of an emerging disease is a crucial aspect for animal health. For the french marine mollusc aquaculture the interest is obvious, after three catastrophic epizooties. The methodological approach must be done by three different disciplines : epidemiology, ecology and marine pathology. Those three approachs are complementary in the special context of marine outbreaks. The uncertainty about many criteria and the lack of  proofs feasible for showing the causality link, make the different approachs a necessity. The first step is the study of the three boxes, host, agent, environrnent. This approach, made for studying the cockles of the Croisic's bay could help us to make hypothesis about the possible origins ofmortality, and to a void measurement,...
Tipo: Text Palavras-chave: Epidémiologie; Maladie émergente; Coques; Cerastoderma edule; Océanologie; Epidemiology; Emerging disease; Cockles; Cerastoderma edule; Oceanology.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/00448/55950/57428.pdf
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La réglementation zoosanitaire et son application à la conchyliculture ArchiMer
Berthe, Franck; Thebault, Anne; Grizel, Henri.
As for other animal production sectors, shellfish farming has been afflicted with various diseases and some constitute limiting factors for the quality or the quantity of production.
Tipo: Text Palavras-chave: Réglementation zoosanitaire; Conchyliculture; Pathologie.
Ano: 1997 URL: http://archimer.ifremer.fr/doc/1997/acte-3246.pdf
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Réseau de veille zoosanitaire des mollusques REPAMO - Rapport d'activité pour l'année 1997 ArchiMer
Berthe, Franck; Pichot, Yves; Chollet, Bruno; Thebault, Anne; Kuntz, Gregoire; Tige, Gilbert; Thebault, Anne; Fleury, Pierre-gildas; Hirata, Toshio; Le Coguic, Yvette; Renault, Tristan; Lipart, Cecile; Grizel, Henri; Joly, Jean-pierre; Mazurie, Joseph; Baud, Jean-pierre; Goulletquer, Philippe; Dreno, Jean-paul; Buestel, Dominique.
Le réseau de veille zoosanitaire des mollusques, REPAMO, a été créé en 1992 afin de protéger les espèces d'intérêt économique des maladies susceptibles de les affecter. En effet, de même que les autres productions animales, la conchyliculture est frappée par diverses maladies dont certaines se comportent comme des facteurs limitants de la qualité ou de la quantité des productions. L' histoire de l'ostréiculture française a connu de tristes expériences en la matière, notamment dans les années 70 pour l' huître creuse portugaise, Crassostrea angulata ou encore pour l'huître plate, Ostrea edulis. En fait, nous ne disposons que de très peu de possibilités de protéger les mollusques bivalves vis à vis des maladies infectieuses. D' une part, les traitements,...
Tipo: Text Palavras-chave: Réseau surveillance; Pathologie; Mollusques bivalves; Mortalité.
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00098/20901/18521.pdf
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Bilans depuis 1999 et évolution de la stratégie du REPAMO ArchiMer
Thebault, Anne; Martin, Anne-genevieve; Pichot, Yves; Chollet, Bruno; Robert, Maeva; Le Coguic, Yvette; Tige, Gilbert; Hirata, Toshio; Mazurie, Joseph; Le Saux, Jean-claude; Masson, Nadine; Auby, Isabelle; Maurer, Daniele; Le Roux, Frédérique; Cochennec, Nathalie; Renault, Tristan; Berthe, Franck; Grizel, Henri.
The main objectives of the Mollusc Pathology Network (REPAMO) are to prevent introductions or outbreaks of infectious agents, prevent spread within a farm and especially from one farm to another, to study ways of decreasing the impact of infectious agent and to monitor the development of these pathogens in order to guarantee the health status of oysters exchanged with our commercial partners. On the whole, REPAMO's activities have not changed and include: - monitoring the development of diseases that have to be reported to authorities and carrying out analyses to classify zones: bonamiosis and marteiliosis; - baseline monitoring of farmed and wild populations of bivalve molluscs; - studying cases of abnormal mortality events; - controlling mollusc...
Tipo: Text Palavras-chave: Mollusques; Réseau surveillance; Pathologie; REPAMO.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/acte-3265.pdf
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Certifying the French population of Crassostrea gigas free from exotic diseases : a risk analysis approach ArchiMer
Thebault, Anne; Berthe, Franck; Audige, L..
Sample-size calculation in the context of the surveys aimed at substantiating freedom from infection have been commonly undertaken an terrestrial animals over recent years, but not on aquatic animals. A recent model developed by Audigé and Beckett in 1999 can be used to plan and assess animal health surveys. The aim of this study was to adapt that model for marine aquaculture, in particular to help in planning surveys aimed at substantiating freedom form two exotic diseases, mikrocytosis and perkinsosis, in the French population of Crassostrea gigas. As a first approach, farmed animals are so frequent that it would be very difficult to be representative of a single area or zone. To find the most appropriate sampling scheme, the model was run using @Risk...
Tipo: Text Palavras-chave: Stochastic modelling; Sensitivity modelling; Risk analysis; Oysters; Molluscs; Crassostrea gigas; Certification; Aquatic animal surveys.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/acte-2710.pdf
Registros recuperados: 32
Primeira ... 12 ... Última
 

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