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Marteiliosis is a disease of molluscs caused by Marteilia refringens in Europe and M. sydneyi in Australia. During routine examination of cultured mussels Mytilus galloprovinciallis in the northern Adriatic, the occurrence of Marteilia sp. was recorded with a prevalence of 5%. This parasite was not ...
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Since its first description, the paramyxean parasite Marteilia refringens (Grizel et al.) has been recognised as a significant pathogen of the European flat oyster Ostrea edulis L. The existence of a complex life-cycle involving several hosts was postulated early on by many authors, although it rema...
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Bonamia sp. is a pathogenic parasite that occurs in the haemocytes of dredge oysters Ostrea chilensis Philippi in New Zealand. Ultrastructurally it resembles other haplosporidians in the possession of haplosporosomes, haplosporogenesis, persistence of mitotic microtubules during interphase and of th...
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Marteilia refringens is one of the most significant pathogens of bivalve molluscs. Previous sequencing of the small subunit ribosomal RNA gene of M. refringens isolates derived from the infected mussels (Mytilus edulis and Mytilus galloprovinciallis) and the oyster (Ostrea edulis) in Europe did not ...
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Two cases of haplosporidian infection occurred during 1993 in Pacific oysters Crassostrea gigas from the French Atlantic coast. The localization and ultrastructure of the plasmodia are described. In situ hybridization of infected tissue sections was conducted with DNA probes for oyster-infecting hap...
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Since its first description, the paramyxean parasite Marteilia refringens has been recognized as a significant pathogen of bivalve mollusks. The existence of a complex life cycle was postulated by many authors. Here we report the development of DNA-based detection assays as powerful tools to elucida...
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A molecular typing study on Vibrio strains implicated in shrimp disease outbreaks in New Caledonia and Japan was conducted by using AP-PCR (arbitrarily primed PCR). It allowed rapid identification of isolates at the genospecies level and studies of infraspecific population structures of epidemiologi...
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Since 1993, significant mortality outbreaks of Penaeus stylirostris usually during winter, have been reported from grow out ponds in New Caledonia. During the mortality peaks in 1994 and 1995, moribund and apparently healthy shrimps were collected from all New Caledonian farms for bacteriological an...
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Since 1990, outbreaks of haemorrhagic septicaemia, frequently associated with keratitis, have occurred on gilthead sea bream (Sparus aurata [Pagrus aurata]), farmed along the French Mediterranean and Atlantic coasts. Several bacterial isolates obtained from diseased sea bream, sea bass (Dicentrarchu...
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Diagnosis of haemic neoplasia (HN) in the soft shell clam, Mya arenaria, is often achieved by hematocytology and histology. Since neoplastic cells display tetraploid DNA contents, haemocyte cell cycle analysis was developed for use as a diagnosis tool. The aim of this study was to assess the applica...
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Gene expression Studies have opened a tremendous field of investigation in biological research over the last decades. Expression of genes is most frequently quantified by real time PCR (RT-qPCR), as this method has proven to be highly sensitive. One of the critical steps, however, in comparing trans...
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Original Abstract: Le protozoaire parasite Marteilia refringens est responsable d'importantes mortalites au sein des elevages d'huitres plates Ostrea edulis, et a participe a la disparition de 90% de la production depuis les annees 60. Une gestion optimale des risques de contamination des huitres pl...