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Virus-like particles associated with brown muscle disease in Manila clam, Ruditapes philippinarum, in Arcachon Bay (France) ArchiMer
Dang, C.; Gonzalez, P.; Mesmer-dudons, N.; Bonami, J-r; Caill-milly, Nathalie; De Montaudouin, X..
Recently, Manila clam, Ruditapes philippinarum, populations have suffered mortalities in Arcachon Bay (SW France). Mortality was associated with extensive lesions of the posterior adductor muscle, which become progressively brown and calcified. Ultrastructural observations by transmission electron microscopy revealed tissue degradation with necrotized muscle fibres and granulocytomas. Unenveloped virus-like particles (VLPs) were detected in muscle, granulocytic, epithelial and rectal cells. VLPs were abundant in the extracellular space, in the cytoplasm (free or enclosed in vesicles) and in the nucleoplasm of granulocytes. Nuclei and mitochondria of granulocytes displayed changes which suggested reactive oxygen species production and apoptosis induction....
Tipo: Text Palavras-chave: Adductor muscle; Apoptosis; Brown muscle disease; Necrosis; Ruditapes philippinarum; Transmission electron microscopy.
Ano: 2009 URL: https://archimer.ifremer.fr/doc/00000/11130/7991.pdf
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Why is Asari (= Manila) clam Ruditapes philippinarum fitness poor in Arcachon Bay: a meta-analysis to answer? ArchiMer
De Montaudouin, X.; Lucia, M.; Binias, C.; Lassudrie, Malwenn; Baudrimont, M.; Legeay, A.; Raymond, N.; Jude-lemeilleur, F.; Lambert, C.; Le Goic, N.; Garabetian, F.; Gonzalez, P.; Hegaret, Helene; Lassus, Patrick; Mehdioub, W.; Bourasseau, L.; Daffe, G.; Paul-pont, I.; Plus, Martin; Do, V. T.; Meisterhans, G.; Mesmer-dudons, N.; Caill-milly, Nathalie; Sanchez, Florence; Soudant, P..
Asari (= Manila) clam, Ruditapes philippinarum, is the second bivalve mollusc in terms of production in the world and, in many coastal areas, can beget important socio-economic issues. In Europe, this species was introduced after 1973. In Arcachon Bay, after a decade of aquaculture attempt, Asari clam rapidly constituted neo-naturalized population which is now fished. However, recent studies emphasized the decline of population and individual performances. In the framework of a national project (REPAMEP), some elements of fitness, stressors and responses in Arcachon bay were measured and compared to international data (41 publications, 9 countries). The condition index (CI=flesh weight/shell weight) was the lowest among all compared sites. Variation in...
Tipo: Text Palavras-chave: Ruditapes philippinarum; Condition index; Perkinsus; Brown Muscle Disease; Element contamination; Immune system; Arcachon Bay.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00280/39123/37676.pdf
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