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Abnormal periostracum secretion during the mineralization process of the pearl in the blacklip pearl oyster Pinctada margaritifera ArchiMer
Comps, Marie-annick; Herbaut, Christian; Fougerouse, Angélique.
Whitish parasite-like bodies (PLBs), 0.5-2 mu m in size, were detected within the pearl bag of some grafted pearl oysters, Pinctada margaritifera, from Takapoto island (French Polynesia). Histological and ultrastructural investigations have revealed that these bodies consisted of lamellar organic material locally secreted by some epithelial cells of the pearl bag. The fine structure and the formation of these bodies are described. The causes of this abnormal secretion of organic mater, which actually corresponds to periostracum, are not presently known. No parasite nor infectious micro-organism was found associated with the PLBs.
Tipo: Text Palavras-chave: Periostracum; Pearl bag; Pinctada margaritifera.
Ano: 2000 URL: http://archimer.ifremer.fr/doc/2000/publication-545.pdf
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Les réseaux d'épidémio-surveillance REPANUI et REPAMO ArchiMer
Joly, Jean-pierre; Cochennec, Nathalie; Fougerouse, Angélique; Francois, Cyrille.
Created in 1992, the French network REPAMO is in charge of the surveillance and monitoring of the mollusc health status along the French coast according to European legislation. The missions of the network are the following: (1) the surveillance of notifiable diseases present in France, (2) the study of abnormal mortalities, (3) the surveillance of health status of cultivated and natural mollusc populations. The more recent network REPANUI has similar goals mainly focused on the pearl oyster health status to support the oyster farming industry in French Polynesia.
Tipo: Text Palavras-chave: REPAMO; REPANUI; Perspective; Gestion; Organisation; Epidémiologie; Réseaux surveillance.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2978.pdf
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Progress in pathological characterization of Syndrome 85 in the black-lip pearl oyster Pinctada margaritifera ArchiMer
Comps, Marie-annick; Herbaut, Christian; Fougerouse, Angélique; Laporte, Florent.
A programme of zoosanitary survey of the populations of black-lip pearl oyster (P. margaritifera) has been developed in French Polynesia during 1996 and 1997. Based on histological and ultrastructural examinations, the study of pearl oysters sampled in several pearl farms from the Society Islands, Tuamotu Atolls and Gambler Archipelago, has been particularly turned to enzootic pathological problems. Particular attention has been given to the shell disease and to the necrosis of the adductor muscle, symptoms that had accompanied the mass mortality in 1985.Virus-like particles, about 40 nm in diameter, were detected in membrane bound vesicles from the necrosized muscle tissue. A new Rickettsia-like organism found in epithelial cells of the digestive tubules...
Tipo: Text Palavras-chave: Sporozoan; Rickettsia; Virus like particle; Shell disease; Blacklip pearl oyster; Sporozoaire; Rickettsie; Particules d'allure virale; Maladie de la coquille; Huître perlière.
Ano: 2001 URL: http://archimer.ifremer.fr/doc/2001/publication-550.pdf
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