Consulta: subjectFacets:"Oyster disease"
Registros recuperados: 3
Data/hora: 07/06/2024 01:03:50

Bonamia parasites: a rapidly changing perspective on a genus of important mollusc pathogens
Provedor de dados: 5
Autores: Engelsma, Marc; Culloty, Sarah C.; Lynch, Sharon A.; Arzul, Isabelle; Carnegie, Ryan B.
Organisms of the genus Bonamia are intracellular protistan parasites of oysters. To date, 4 species have been described (B. ostreae, B. exitiosa, B. perspora and B. roughleyi), al though the status of B. roughleyi is controversial. Introduction especially of B. ostreae and B. exitiosa to naïve host populations has been shown to cause mass mortalities in the past and has had a dramatic impact on oyster production. Both B. ostreae and B. exitiosa are pathogens notifiable to the World Organisation for Animal Health (OIE) and the European Union. Effective management of the disease caused by these pathogens is complicated by the extensive nature of the oyster production process and limited options for disease control of the cultured stocks in open water. This...
Tipo: Text
Palavras-chave: Bonamia ostreae; Bonamia exitiosa; Oyster disease; Phylogenetics; Geographical spread; Diagnostics; Epizootiology; Host-parasite interaction; Bonamiosis.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00200/31169/29568.pdf

Differential basal expression of immune genes confers Crassostrea gigas resistance to Pacific Oyster Mortality Syndrome
Provedor de dados: 5
Autores: De Lorgeril, Julien; Petton, Bruno; Lucasson, Aude; Perez, Valérie; Stenger, Pierre-louis; Degremont, Lionel; Montagnani, Caroline; Escoubas, Jean Michel; Haffner, Philippe; Allienne, Jean-françois; Leroy, Marc; Lagarde, Franck; Vidal Dupiol, Jeremie; Gueguen, Yannick; Mitta, Guillaume.
Background: As a major threat to the oyster industry, Pacific Oyster Mortality Syndrome (POMS) is a polymicrobial disease affecting the main oyster species farmed across the world. POMS affects oyster juveniles and became panzootic this last decade, but POMS resistance in some oyster genotypes has emerged. While we know some genetic loci associated with resistance, the underlying mechanisms remained uncharacterized. So, we developed a comparative transcriptomic approach using basal gene expression profiles between different oyster biparental families with contrasted phenotypes when confronted to POMS (resistant or susceptible). Results: We showed that POMS resistant oysters show differential expression of genes involved in stress responses, protein...
Tipo: Text
Palavras-chave: Pacific oyster; Oyster disease; Resistance; OsHV-1; Antiviral molecular pathways; Invertebrate immunity.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00602/71369/69811.pdf

Spatial epidemiological modelling of infection by Vibrio aestuarianus shows that connectivity and temperature control oyster mortality
Provedor de dados: 5
Autores: Lupo, Coralie; Dutta, Bhagat Lal; Petton, Sebastien; Ezanno, P; Tourbiez, Delphine; Travers, Marie-agnes; Pernet, Fabrice; Bacher, Cedric.
Vibrio aestuarianus infection in oyster populations causes massive mortality, resulting in losses for oyster farmers. Such dynamics result from host-pathogen interactions and contagion through water-borne transmission. To assess the spatiotemporal spread of V. aestuarianus infection and associated oyster mortality at a bay scale, we built a mathematical model informed by experimental infection data at 2 temperatures and spatially dependent marine connectivity of oyster farms. We applied the model to a real system and tested the importance of each factor using a number of modelling scenarios. Results suggest that introducing V. aestuarianus in a fully susceptible adult oyster population in the bay would lead to the mortality of all farmed oysters over 6 to...
Tipo: Text
Palavras-chave: Basic reproduction number; Crassostrea gigas; Hydrodynamics; Oyster disease; Sensitivity analysis; Vibrio aestuarianus.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00662/77459/79114.pdf