Consulta: subjectFacets:"Brown ring disease"
Registros recuperados: 3
Data/hora: 11/06/2024 07:35:24

Relation between Biofilm and Virulence in Vibrio tapetis: A Transcriptomic Study
Provedor de dados: 5
Autores: Rodrigues, Sophie; Paillard, Christine; Van Dillen, Sabine; Tahrioui, Ali; Berjeaud, Jean-marc; Dufour, Alain; Bazire, Alexis.
Marine pathogenic bacteria are able to form biofilms on many surfaces, such as mollusc shells, and they can wait for the appropriate opportunity to induce their virulence. Vibrio tapetis can develop such biofilms on the inner surface of shells of the Ruditapes philippinarum clam, leading to the formation of a brown conchiolin deposit in the form of a ring, hence the name of the disease: Brown Ring Disease. The virulence of V. tapetis is presumed to be related to its capacity to form biofilms, but the link has never been clearly established at the physiological or genetic level. In the present study, we used RNA-seq analysis to identify biofilm- and virulence-related genes displaying altered expression in biofilms compared to the planktonic condition. A...
Tipo: Text
Palavras-chave: Biofilm; Virulence; Vibrio tapetis; Transcriptome; Quorum sensing; Type VI secretion system; Brown ring disease.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00470/58140/60611.pdf

Development of a Taqman real-time PCR assay for rapid detection and quantification of Vibrio tapetis in extrapallial fluids of clams
Provedor de dados: 5
Autores: Bidault, Adeline; Richard, Gaelle G.; Le Bris, Cedric; Paillard, Christine.
The Gram-negative bacterium Vibrio tapetis is known as the causative agent of Brown Ring Disease (BRD) in the Manila clam Venerupis (=Ruditapes) philippinarum. This bivalve is the second most important species produced in aquaculture and has a high commercial value. In spite of the development of several molecular methods, no survey has been yet achieved to rapidly quantify the bacterium in the clam. In this study, we developed a Taqman real-time PCR assay targeting virB4 gene for accurate and quantitative identification of V. tapetis strains pathogenic to clams. Sensitivity and reproducibility of the method were assessed using either filtered sea water or extrapallial fluids of clam injected with the CECT4600(T) V. tapetis strain. Quantification curves of...
Tipo: Text
Palavras-chave: Vibrio tapetis; VirB4 gene; Taqman real-time PCR; Molecular diagnostic; Venerupis philippinarum; Marine pathogen; Brown ring disease.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00308/41909/73194.pdf

Transcriptomic analysis of clam extra pallial fluids reveals immunity and cytoskeleton alterations in the first week of Brown Ring Disease development
Provedor de dados: 5
Autores: Rahmani, Alexandra; Corre, Erwan; Richard, Gaëlle; Bidault, Adeline; Lambert, Christophe; Oliveira, Louisi; Thompson, Cristiane; Thompson, Fabiano; Pichereau, Vianney; Paillard, Christine.
The Brown Ring Disease is an infection caused by the bacterium Vibrio tapetis on the Manila clam Ruditapes philippinarum. The process of infection, in the extrapallial fluids (EPFs) of clams, involves alteration of immune functions, in particular on hemocytes which are the cells responsible of phagocytosis. Disorganization of the actin-cytoskeleton in infected clams is a part of what leads to this alteration. This study is the first transcriptomic approach based on collection of extrapallial fluids on living animals experimentally infected by V. tapetis. We performed differential gene expression analysis of EPFs in two experimental treatments (healthy-against infected-clams by V. tapetis), and showed the deregulation of 135 genes. In infected clams, a...
Tipo: Text
Palavras-chave: Brown ring disease; V. tapetis; R. philippinarum; Hemocytes; Actin cytoskeleton; Beta-Thymosin; Coactosin; Resting cells.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00510/62131/66362.pdf