Consulta: creatorFacets:"Comps, Michel"
Registros recuperados: 77
Data/hora: 07/06/2024 01:49:15

La maladie des branchies chez les huitres du genre Crassostrea caracteristiques et evolution des alterations processus de cicatrisation
Provedor de dados: 5
Autores: Comps, Michel.
A few observations were mentioned in an earlier paper (COMPS, 1969) that concerned the histological features of the lesions that appeared during the gill infection to which Crassostrea angulata has been particularly prone since 1966. Since it has, however, not been possible to date to isolate and grow a culture of the parasite presumed to be the responsible agent of the disease, a more complete anatomopathological and histological study was contemplated in order to try to specify the definition of the offending protist and reveal the process of deterioration of the oyster's tissues as well as the reactions of the host to the infestation by and growth of the parasite.  In addition, importing Crassostrea gigas THUNBERG from Japan at the very moment that gill...
Tipo: Text
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-3145.pdf

Mise en evidence d'une microsporidie parasite de Marteilia refringens agent de la maladie de la glande digestive de Ostrea edulis L.
Provedor de dados: 5
Autores: Comps, Michel; Pichot, Yves; Deltreil, Jean-pierre.
Tipo: Text
Palavras-chave: Ostrea Edulis L.; Digestive Gland; Marteilia Refringens; Cytology; Parasitology.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-1945.pdf

Observations relatives à une expérience de reproduction artificielle des huîtres du Pacifique (Crassostrea gigas Thunberg)
Provedor de dados: 5
Autores: Comps, Michel.
The artificial production of oyster spats in Japan and the USA provided inspiration to some French oyster farmers who thought that, at a time when stocking up Crassostrea gigas spats was getting more difficult, it would be interesting to try out the nutrition techniques developed by Japanese and American specialists. In this way, in La Tremblade, in the Marennes basin, M. Paul Jarno set up some structures aimed at artificial oyster reproduction. Trials started in 1968 and continued in July 1969. The first step was to assess the material and structures' usability and to take a closer look at the practical larval nutrition conditions in order to obtain fixed spats. This document is a collection of the observations carried out during the different trials.
Tipo: Text
Palavras-chave: Reproduction artificielle; Larves; Naissain; Reproduction; Crassostrea gigas; Huître.
Ano: 1970
URL: http://archimer.ifremer.fr/doc/1970/publication-6285.PDF

Parasites nouveaux de la glande digestive des mollusques marins Mytilus edulis L. et Cardium edule L.
Provedor de dados: 5
Autores: Comps, Michel; Grizel, Henri; Tige, Gilbert; Duthoit, Jean-louis.
Some similar stages to those of the digestive gland parasite in the Ostrea edulis have been observed in the Mytilus edulis as well as in the Cardium edule in which the simultaneous presence of some Microsporidia spores was noticed. Their study with an electron microscope enabled the description of their structural specificities and characteristics.
Tipo: Text
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/publication-5914.PDF

Marteilia lengehi n.sp., parasite de l'huitre Crassostrea cucullata Born
Provedor de dados: 5
Autores: Comps, Michel.
A new record of a parasite designated Marteilia lengehi sp.nov. The Persian Gulf oyster Crassostrea cucullata was the host
Tipo: Text
Palavras-chave: Persian Gulf; ISW; Marteilia lengehi; Crassostrea cucullata; New species; Parasites.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/publication-1802.pdf

Mortalités d'huîtres japonaises sur le Banc de Ronce Les Bains : rapport provisoire au 4/8/88
Provedor de dados: 5
Autores: Bodoy, Alain; Garnier, Jacqueline; Geairon, Philippe; Chagot, Dominique; Grizel, Henri; Comps, Michel; Razet, Daniel.
Depuis le mois de juin 1988, les ostréiculteurs ont fait part de la présence de mortalités importantes sur le banc de Ronce (bassin de Marennes-Oléron), d'abord auprès de l'Ifremer et des Affaires Maritimes, puis des pouvoirs publics. Ces problèmes ont été évoqués lors d'une réunion en Préfecture de Charente-Maritime, le 4 juillet 1988. Il s'est alors avéré nécessaire de réaliser un constat de la situation notamment sur le banc de Ronce, et de faire le point sur les causes pouvant être à l'origine de la situation sur les mortalités survenues dans cette zone. Cette décision a été confirmée le 12 juillet, lors d'une réunion à la Sous-Préfecture de Rochefort. Le présent rapport présente les résultats scientifiques actuellement disponibles, ainsi que les...
Tipo: Text
Palavras-chave: Mortalité; Météorolgie; Paramètres hydrologiques; Physiologie; Croissance; Bivalvia; Crassostrea gigas; Bassin de Marennes Oléron.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/00086/19765/17406.pdf

Fine spore structure of a haplosporidan parasitizing Crassostrea gigas: taxonomic implications
Provedor de dados: 5
Autores: Comps, Michel; Pichot, Yves.
Several cases of haplosporidan infection have been detected recently in PacifiC oysters Crassostrea gigas from Etang de Thau, France. The ultrastructure of the spore, including the surface ornamentation, is described and appears similar to thal of Haplospondium costale. The taxonomie implications of these findings are discussed.
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/publication-6077.pdf

Rapport sur les causes des mortalités d'huîtres creuses observées en juin 1992 sur le Banc de Ronce Les Bains (Bassin de Marennes-Oléron)
Provedor de dados: 5
Autores: Heral, Maurice; Bacher, Cedric; Razet, Daniel; Prou, Jean; Galgani, Francois; Renault, Tristan; Bodoy, Alain; Garnier, Jacqueline; Geairon, Philippe; Chagot, Dominique; Grizel, Henri; Comps, Michel; Masson, Daniel; Noinin, Michel.
Dès le 4 JUIN 1992, un ostréiculteur digne de confiance avait signalé aux services d'IFREMER, une situation anormale sur le banc de Ronce les Bains. Un premier prélèvement a été effectué le jour même. En effet, ce secteur avait déjà été le lieu de mortalités d'huitres estimées à 7 000 tonnes, au printemps 1988, et s'est révélé par le passé comme étant un endroit sensible. Pour information, figure en annexe le rapport établi en 1988, à destination du Préfet de la Charente Maritime. Ces mortalités ayant rapidement pris de l'ampleur, un dépôt de plainte contre X a été effectué par la Section Régionale de la Conchyliculture. A la suite de quoi, les services d'IFREMER ont été requis par la Gendarmerie Nationale (Brigade de Marennes) le 10 juin 1992, pour...
Tipo: Text
Palavras-chave: Ostréiculture; Huîtres creuses; Crassostrea gigas; Mortalité; Banc de Ronce Les Bains; Bassin de Marennes Oléron.
Ano: 1992
URL: http://archimer.ifremer.fr/doc/00048/15899/13327.pdf

Essai de culture de l'huître plate Ostrea edulis dans le bassin d'Arcachon. Résultats préliminaires
Provedor de dados: 5
Autores: Robert, Rene; Pichot, Yves; Comps, Michel.
From 1988 to 1989, a study has been conducted pertaining to the growth of the flat oyster Ostrea edulis, as well as Marteilia refringens and Bonamia ostreae outbreaks.  Commercial mono specific farming (flat oysters), with low density or mixed (flat and hollow oysters) along with higher density, has been taking place in the Arcachon basin oceanographic sectors, where main hydrobiological parameters were acquired simultaneously.   The excellent growth of the flat oyster was witnessed in mono specific farming. However this growth was average in mixed farming, probably due to higher total oyster density and interspecies competition. Regardless of the type of farming, Marteilia refringens infection was very quick and may have been related to climatic bay water...
Tipo: Text
Palavras-chave: Basin of Arcachon; Pathology; Bonamia ostreae; Marteilia refringens; Growth; Ostrea edulis; Bassin d'Arcachon; Pathologie; Bonamia ostreae; Marteilia refringens; Croissance; Ostrea edulis.
Ano: 1990
URL: http://archimer.ifremer.fr/doc/1990/rapport-1592.pdf

Mise en évidence d'une infection rickettsienne chez les huîtres
Provedor de dados: 5
Autores: Comps, Michel; Bonami, Jean-robert; Vago, Constantin.
Un microorganisme procaryote a été observé dans le cytoplasme des cellules de diverticules digestifs de l'huître Crassostrea gigas . L'étude des caractéristiques du germe permet de considérer celui-ci comme appartenant aux Rickettsiales sans cycle de type chlamydien.
Tipo: Text
Palavras-chave: Huître creuse; Crassostrea gigas; Pathologie; Rickettsie; Histologie.
Ano: 1977
URL: http://archimer.ifremer.fr/doc/00041/15241/12559.pdf

Epizootic diseases of oysters associated with viral infections
Provedor de dados: 5
Autores: Comps, Michel.
Virus infections have been associated with major diseases of oysters of the genus Crassostrea. These infections include gill necrosis virus and hemocytic infection virus diseases of the Portuguese oyster C. angulata and more recently the oyster velar virus disease affecting larval, hatchery-reared Pacific oysters C. gigas. This report presents histo- and cytopathological characteristics of these infections in which large icosahedral cytoplasmic deoxyriboviruses, similar to the iridoviridae, are implicated, The gill necrosis virus causes, principally in the Portuguese oyster, an evolutive ulceration of the gills, including cellular hypertrophy and severe inflammation. Mortalities have been observed in the most serious cases. Hemocytic infection virus has...
Tipo: Text
Palavras-chave: Crassostrea gigas; Crassostrea angulata; Oysters; Viral diseases.
Ano: 1988
URL: http://archimer.ifremer.fr/doc/1988/publication-5912.PDF

Données sur le nouveau parasite de l'huître plate. Situation épidémiologique
Provedor de dados: 5
Autores: Tige, Gilbert; Grizel, Henri; Comps, Michel.
Abnormal mortalities of flat oysters, Ostrea edulis, have been monitored in June 1979 in some farms of l'Ile Tudy. The examination of these oysters with light and electron microscopy showed different forms of an intracellular parasite localized in the connective tissue of the gills and the digestive gland. It is also detectable in the blood vessels and the stomachal epithelium. Numerous parasited oysters showed distinctive branchial damages (perforations, indentations) visible through macroscopic examination. The epidemiological monitoring carried out on the Norman and Breton coast revealed the presence of this parasite in a large number of flat oyster farms. The percentage of parasited oysters is higher in areas where mortalities have been monitored but...
Tipo: Text
Palavras-chave: Epidémiologie; Huître plate; Ostrea edulis; Mortalité.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/acte-4925.PDF

Infection chlamydienne chez le lavignon Scrobicularia piperatâ (P.) du bassin de Marennes-oleron
Provedor de dados: 5
Autores: Comps, Michel; Razet, Daniel; Cousserans, Francois.
Tipo: Text
Palavras-chave: Scrobicularia Piperatâ (P.); Chlamyd; Parasitology; Digestive Epithelium; Cytology; Histology.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-1946.pdf

Observations ultrastructurales sur Ameson nelsoni (Sprague, 1950) microsporidie parasite de la crevette Parapenaeus longirostris Lucas. Consequences taxonomiques.
Provedor de dados: 5
Autores: Loubes, Claude; Maurand, Jean; Comps, Michel; Campillo, Albert.
The sporogony of A. nelsoni is of the apansporoblastic type. Diplocaryons always occur during merogony, never occur during sporogony. Sporoblasts are produced by fission of a multinucleate and elongated plasmodium. Spore morphogenesis begins before the end of the end of the sporoblasts individualization. The polaroplast has a very dense outer area. The genus Ameson is very much like genus Perezia and both are badly classified respectively in the families Nosematidae and Unikaryonidae. The creation of the new family Pereziidae is proposed for both genera.
Tipo: Text
Palavras-chave: MED; Ameson nelsoni; Speciation; Taxonomy.
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/publication-1969.pdf

Un microorganisme de type rickettsien chez l'huître portugaise Crassostrea angulata Lmk
Provedor de dados: 5
Autores: Comps, Michel; Deltreil, Jean-pierre.
A prokaryotic microorganism has been observed in the cells of the digestive gland of Crassostrea angulata, an oyster of economic importance. The study of its characteristics shows that it has a chlamydial type cycle with structural particularities.
Tipo: Text
Palavras-chave: Pathologie; Crassostrea angulata; Huître; Procaryote.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-6081.PDF

Sur un copépode parasite de l'huître portugaise (Crassostrea angulata Lmk) dans le bassin de Marennes- Oléron
Provedor de dados: 5
Autores: Comps, Michel.
Dans le bassin de Marennes-Oléron, à partir de l’hiver 1970, on a observé chez Crassostra angulata la présence d’un copépode fixé sur les branchies. Cet organisme a attiré l’attention de certains ostréiculteurs et ce, d’autant plus qu’il n’était rencontré que chez les huîtres immergées dans des claires. Ce copépode posséderait des caractéristiques morphologiques proches de celles des Pseudomyicolidae
Tipo: Text
Palavras-chave: Copépode; Parasite; Huîtres; Crassostrea angulata; Pseudomyicola; Marennes Oléron; Charente Maritime.
Ano: 1972
URL: http://archimer.ifremer.fr/doc/00009/12004/8696.pdf

Infection rickettsienne de Donax trunculus
Provedor de dados: 5
Autores: Comps, Michel.
Identification card of the diseases and parasites infection fishes, crustaceans and molluscs, prepared in the framework of the CIEM workgroup on the CIEM workgroup on the pathology and diseases of marine organisms.
Tipo: Text
Palavras-chave: Donax trunculus; Etiologie; Prophylaxie et traitement; Histopathologie; Donax trunculus; Etiology; Control; Histopathology.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00140/25078/23184.pdf

Infection virale associée à des mortalités chez l'huître Crassostrea gigas Thunberg
Provedor de dados: 5
Autores: Comps, Michel; Bonami, Jean-robert.
Some viral particles close to the lridovirus are described in the cytoplasm of some connective cells in the Japanese oyster Crassostrea gigas. This virus looks similar to the one described in Crassostrea angulata and associated with the mortalities of 1970-1973 and to the one observed in the gill damages in the same species.
Tipo: Text
Palavras-chave: Virus; Mortalité; Pathologie; Crassostrea gigas; Huître.
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/publication-6082.PDF

Recherches sur un protiste, parasite nouveau de l'huître plate des côtes françaises
Provedor de dados: 5
Autores: Comps, Michel.
Following a number of mortalities reported on the flat oyster farms of the Ile Tudy in June 1979, a Protiste, a parasite then unknown in France, was found in the sick oysters. Located mainly in the connective tissue and the branchial epithelium, this parasite is associated with tissue damage. It can be either of a free type or of an intracellular type, both corresponding to small size cells (2 to 3 µm) and displaying, next to their core, one or two mitochondrion and some structured electron-dense particles. Moreover, different mitosis stages, with nuclear membrane persistence, have been observed. These ultrastructural characteristics show some similarities and differences with the Haplosporidies and Marteilia groups.
Tipo: Text
Palavras-chave: Mortalités; Parasite; Ostreae edulis; Huître plate.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/acte-6155.PDF

Caractéristiques des mortalités estivales de l'huître Crassostrea gigas dans le bassin d'Arcachon
Provedor de dados: 5
Autores: Maurer, Daniele; Comps, Michel; His, Edouard.
Summer mortalities in the Pacific oyster in the Bay of Arcachon were analysed during four years (1981 to 1984). Mortalities occur mostly among one year old oyster and affect the whole bay, with different prevalence. The phenomenon occurs at certain times during the summer spawning period and is associated with high temperatures. A thinning of the digestive tubule epithelium is observed, but there is no evidence of infectious disease. The failure to find a causative agent, pollution or pathogen, tends to strengthen a physiological disorder hypothesis, related to environmental conditions. The influence of external (temperature, available food) and internai factors (length, maturation, spawning) on this phenomenon is discussed. A comparaison is drawn with...
Tipo: Text
Palavras-chave: Bay of Arcachon; Summer mortalities; Crassostrea gigas; Bassin d'Arcachon; Mortalités estivales; Crassostrea gigas.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-4318.pdf

Une virose de l'huître portugaise (Crassostea angulata LMK)
Provedor de dados: 5
Autores: Comps, Michel; Bonami, Jean-robert; Vago, Constantin; Campillo, Albert.
A viral infection has been observed in the Portuguese oyster Crassostrea angulata during the massive mortalities of 1970-1973. A new type of virus and the viral morphogenesis are described. It is the first virus observed in oysters and linked to an epizooty in this mollusc of great economic importance.
Tipo: Text
Palavras-chave: Infection virale; Crassostrea angulata; Huître; Virologie.
Ano: 1991
URL: http://archimer.ifremer.fr/doc/1991/publication-6084.PDF

An infection of Ruditapes decussatus (Bivalvia) by Rickettsia
Provedor de dados: 5
Autores: Mialhe, Eric; Chagot, Dominique; Boulo, Viviane; Comps, Michel; Ruano, Francisco; Grizel, Henri.
The authors report the presence of a Rickettsia in Ruditapes decussatus from natural populations of the Algarve (Portugal). Light microscopic shows infections of varying importance in gill tissues. Some enclose small procaryotic colonies (cp) scattered in all lamellae; in others, the colonies are scarce and hypertrophic (100 mu m). These different pictures suggest an amplification process. Digestive diverticulae may also be infected, but to a lesser extent. The ultrastructural features of this intravacuolar (mvd: densified vacuolar membrane) procaryote (P) and its multiplication by scission without a complex developmental cycle allows its classification in the order Rickettsiales.
Tipo: Text
Palavras-chave: Ruditapes philippinarum; Pathogens; Histopathology; Pathology.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-3107.pdf

Etude ultrastructurale des Marteilioides chungmuensis N.G., N. SP. parasite des ovocytes de l'huître Crassostrea gigas Th.
Provedor de dados: 5
Autores: Comps, Michel; Park, M. S.; Desportes, Isabelle.
Ultrastructural study of a parasite first reported in 1978 in Korea, in the oocytes of the Pacific oyster Crassostrea gigas then reported again in 1984 in Chungmu Bay oysters. The observed stages are typical of those of the Paramyxea Levine 1980 group. The development consists of the production of secondary cells within a stem cell; these secondary cells then producing one tertiary cell. The specific evolution of the sporogenesis leading to the production of one single tricellular spore per sporont distinguishes the studied parasite from other Paramyxea
Tipo: Text
Palavras-chave: Sporogenèse Ultrastructure Paramyxea Crassostrea gigas Huître Ovocytes Parasite Marteilioides chungmuensis; N.g; N.sp.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-6154.PDF

Virus-like particles in pearl oyster Pinctada margaritifera
Provedor de dados: 5
Autores: Comps, Michel; Herbaut, Ch.; Fougerouse, A.
Virus-like particles were detected in granulomas associated with focal necrosis within the adductor muscle of the pearl oyster Pinctada margaritifera from French Polynesia. About 40 nm in size, the se particles were generally found within cytoplasmic vesic1es inside heavily degenerated granulocytes. More studies are required to further characterize them.
Tipo: Text
Palavras-chave: Pinctada margaritifera; Pathology; Pearl oyster; Virus like.
Ano: 1999
URL: http://archimer.ifremer.fr/doc/1999/publication-6079.PDF

Recherches histologiques et cytologiques sur les infections intracellulaires des mollusques bivalves marins
Provedor de dados: 5
Autores: Comps, Michel.
Trois types d'infections intracellulaires des molluques bivalves marins sont étudiés dans leurs aspects histologiques et ultrastructuraux. La première partie traite de deux maladies causées par des virus ADN intracytoplasmiques chez les huîtres Crassostrea angulata et Crassostrea gigas : la maladie des branchies et les mortalités massives de 1970 à 1977. Les caractéristiques morphologiques et ultrastructurales de vrions, leur morphogénèse et les effets pathogènes sont décrits et développés dans une étude comparative des deux types de viroses. Dans la seconde partie sont abordées les infections rickettsiennes des Pélécypodes marins avec la description de procaryotes appartenant aux Rickettsiales et d'agents infectieux à cycle de développement...
Tipo: Text
Palavras-chave: Mollusques bivalves marins; Infections intra-cellulaires; Virus; Iridovirus; Rickettsies; Cycle chlamydien; Protiste; Histologie; Ultrastructure.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00422/53365/54209.pdf

Recherche sur Marteilia maurini n. sp. parasite de la moule Mytilus galloprovincialis Lmk.
Provedor de dados: 5
Autores: Comps, Michel; Pichot, Yves; Papagianni, Panagiota.
Histological control practiced in 1981 revealed that the mussel Mytilus galloprovincialis is infected by a new parasite Marteilia maurini sp. n. The structure and the cycle of development are described. The particularities of this parasite in the genus Marteilia are given and discussed.
Tipo: Text
Palavras-chave: Marteilia maurini; Mytilus galloprovincialis; New species; Taxonomy; Mussel culture; Histopathology; Histology.
Ano: 1981
URL: http://archimer.ifremer.fr/doc/1981/publication-1895.pdf

Les infections virales associées aux épizooties des huîtres du genre Crassostrea
Provedor de dados: 5
Autores: Comps, Michel.
Des infections virales ont été décrites chez les huîtres portugaises Crassostrea angulata des côtes françaises successivement affectées par la maladie des branchies et par la mortalité massive de 19670. Ultérieurement, un nouveau virus a été trouvé chez Crassostrea gigas durant des mortalités dans la Baie d'Arcachon. Les virus impliqués ont des caractéristiques similaires pour ce qui concerne la taille, la morphologie, l'ultrastructure et la morphogénèse intracytoplasmique. Dans le cas des virus de mortalité, les cellules infectées du tissu interstitiel renferment une inclusion cytoplasmique et des granulations basophiles correspondant à un stroma virogène et à des particules. Les vibrions matures de structure icosaèdre mesurent 380 nm. Ils sont limités...
Tipo: Text
Palavras-chave: Virologie; Infection virale; Huîtres creuses; Crassostrea.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/00015/12659/9525.pdf

Etude ultrastructurale d'une haplosporidie parasite de la palourde Tapes decussatus L.
Provedor de dados: 5
Autores: Joly, Jean-pierre; Comps, Michel.
The existence of a Haplosporidie parasite in the clam Tapes deucussatus has been demonstrated by Vilela (1950) with the description, based on classical histology observations, of a new species: Haplosporidium tapetis Vilela. Recently, the examination of the histological sections of the digestive glands of some clams from the Thau lagoon helped the scientists to find, in the stomachal epithelium, some forms comparable to the plasmodium of H. tapetis and to precise their ultrastructure.
Tipo: Text
Palavras-chave: Parasite; Haplosporidium; Pathologie; Tapes decussatus; Palourde.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/acte-6080.PDF

Biophysical and biochemical properties of an unusual birnavirus pathogenic for rotifers
Provedor de dados: 5
Autores: Comps, Michel; Mari, Jocelyne; Poisson, Francois; Bonami, Jean-robert.
A cytoplasmic dsRNA virus, rotifer birnavirus (RBV), has recently been isolated from the rotifer Brachionus plicatilis and is associated with a high mortality rate. Histologically, the viral lesions consist of characteristic inclusions, particularly amorphous dense bodies containing occluded particles. Purified virions are about 59 nm in diameter, single-shelled and display four capsomers per edge. The purified virions have a buoyant density of 1.290 (full particles) and 1.250 (empty particles) in CsCI gradients. Four major structural polypeptides of Mrs 60K, 52K, 33K and 27K were detected by SDS-PAGE. The genome is composed of two linear segments of dsRNA with Mrs of 2.45 x 106 and 2.31 × 106; additionally, small circular ssRNA molecules were detected by...
Tipo: Text
Ano: 1991
URL: http://archimer.ifremer.fr/doc/00129/24032/21994.pdf

Fish nodavirus lytic cycle and semipermissive expression in mammalian and fish cell cultures
Provedor de dados: 5
Autores: Delsert, Claude; Morin, Nathalie; Comps, Michel.
In this study, Dicentrarchus labrax encephalitis virus (DIEV), which causes sea bass encephalitis, was propagated in cell culture, thus allowing study of its lytic cycle, DIEV infection of mammalian and fish cells induced different patterns of expression of capsid proteins, which were assembled as virus-like particles, accumulating in the cytoplasm either as diffuse masses or in vesicles, as shown by electron microscopy, These particles correspond to virions, as shown by their ability to induce Secondary infection, Fish cells proved to be more permissive for DIEV than mammalian cells, although virus yield remained low, RNA analysis of infected sea bass cells revealed DIEV RNA3, in addition to genomic RNA1 and RNA2, and the presence of the RNA;! minus...
Tipo: Text
Ano: 1997
URL: http://archimer.ifremer.fr/doc/00336/44697/44983.pdf

Culture in vitro de Bonamia ostreae parasite hémocytaire de l'huître plate Ostrea edulis L.
Provedor de dados: 5
Autores: Comps, Michel.
The development of Bonamia ostreae, a parasite responsible for an important disease in the flat oyster plate Ostrea edulis, has been achieved in vitro through the contamination of cultures of explanted oyster tissues. A description of the cultured parasite's cytological characteristics is provided.
Tipo: Text
Palavras-chave: Ostrea edulis; Huître plate; Parasite; Bonamia ostreae; Pathologie.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/publication-6156.PDF

Rickettsia-like organism infecting juvenile sea-bass Dicentrarchus labrax
Provedor de dados: 5
Autores: Comps, Michel; Raymond, J. C.; Plassiart, G. N.
High levels of mortalities (20%) associated with abnormal swimming have been observed in farmed juveniles of seabass, Dicentrarchus labrax, in Mediterranean coast, southern France. Histopathology was obvious in the brain with nervOUS tissue necrosis and the presence of ceUs containing basophilic granules corresponding to smaU coccoid organisms. Ultrastructural examination revealed these organisms were rickettsia-like organisms morphologicaUy close to Piscirickettsia salmonis
Tipo: Text
Palavras-chave: Pathology; Dicentrarchus labrax; Sea Bass; Rickettsia like.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/1996/publication-6158.PDF

Observation en Mediterranee de la microsporidie Ameson (Nosema) nelsoni (Sprague, 1950), un parasite de la crevette Parapenaeus longirostris Lucas.
Provedor de dados: 5
Autores: Campillo, Albert; Comps, Michel.
Ameson (Nosema) nelsoni, a microsporidian originally described from North-American shrimps has been observed as a parasite of P.longirostris in the Mediterranean.
Tipo: Text
Palavras-chave: MED; Parapenaeus longirostris; Ameson (Nosema) nelsoni; New records; Parasites.
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/publication-1968.pdf

Infection parasitaire causée par Marteilia maurini sp. n. chez la moule Mytilus galloprovincialis
Provedor de dados: 5
Autores: Comps, Michel; Grizel, Henri; Papayanni, Youla.
During the last year (1981), zoosanitaries control was practiced on the mussel Mytilus galloprovincialis from Venise lagoon. This species is infected by new parasite Marteilia maurini sp. n. His structurals characteristic and his development cycle are similar to those of Marteilia refringens in the fIat oyster.
Tipo: Text
Palavras-chave: Parasite; Pathologie; Marteilia maurini; Mytilus galloprovincialis.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/acte-3226.pdf

Sur un sporozoaire parasite de Crassotrea rhizophorae (Guilding)
Provedor de dados: 5
Autores: Comps, Michel; Grizel, Henri; Tige, Gilbert.
Along the French Guiana coast, mainly in the Monsinéry River, there are populations of natural oysters belonging to the species Crassostrea rhizophorae (Guilding). Within the scope of the growth of oyster farming in Guiana, we researched possible parasites of these oysters that are still little studied. This work, conducted based on living and set samples, allowed us to highlight the presence of nematops spores.
Tipo: Text
Palavras-chave: Guyane; Crassostrea rhizophorae; Parasite; Pathologie; Huîtres.
Ano: 1972
URL: http://archimer.ifremer.fr/doc/1972/publication-3008.pdf

Histological study of a cellular reaction in Ruditpaes decussatus infected by a protozoan
Provedor de dados: 5
Autores: Chagot, Dominique; Comps, Michel; Boulo, Viviane; Ruano, Francisco; Grizel, Henri.
An infection caused by a Perkinsus -like parasite has been observed in Ruditapes decussatus from Portugal (Comps and Chagot, 1987). Following a pathological study carried out on clams affected by mortalities in the Algarve area, this parasite was found again, inducing a reaction process in the host. Histological examination reveals the parasite in the connective tissue of different organs. The adjoining tissues, particularly the epithelia, are not affected.
Tipo: Text
Palavras-chave: Cells; Histology; Pathology; Ruditapes decussatus.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-3109.pdf

Etude morphologique d'une infection rickettsienne de la Palourde Ruditapes philippinarum Adam et Reeves.
Provedor de dados: 5
Autores: Comps, Michel.
Intracytoplasmic microcolonies of a new rickettsia were observed in epithelial cells of the digestive gland of Ruditapes philippinarum. The intracellular development includes several stages with peculiar structure. The systematic position of this procaryote is discussed.
Tipo: Text
Palavras-chave: Pays de Loire ANE; France Bivalvia Donax trunculus Ruditapes philippinarum diseases shellfish culture animal morphology.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-1856.pdf

Etude expérimentale de différentes conditions de mileu sur le comportement du parasite de la glande digestive de l'huître plate (Ostrea edulis L.)
Provedor de dados: 5
Autores: Comps, Michel.
During trials on the influence of environmental factors on the parasite of the flat oyster digestive gland, we observed that some experimental conditions including the re-immersion after a several day-exsiccation period could result in a decrease of the parasitism rate.
Tipo: Text
Palavras-chave: Glande digestive; Huître plate; Ostrea edulis; Bivalve; Pathologie; Parasitologie.
Ano: 1975
URL: http://archimer.ifremer.fr/doc/1975/acte-6168.PDF

Mise en évidence par fluorescence du virus de la maladie des branchies de l'huître portugaise Crassostrea Angulata LMK
Provedor de dados: 5
Autores: Comps, Michel.
L'étude en microscopie électronique de la maladie des branchies de l'huître portugaise a permis d'établir que les cellules géantes observées dans les tissus en voie de nécrose, étaient le siège de lésions virales intracytoplasmiques (Comps et Duthoit, 1976).
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-7080.pdf

Maladie hémocytaire de l'huître plate
Provedor de dados: 5
Autores: Comps, Michel.
Tipo: Text
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00423/53400/54272.pdf

Infection rickettsienne de la glande digestive de Donax Trunculus linné
Provedor de dados: 5
Autores: Comps, Michel; Raimbault, René.
Après la mise en évidence d'infections rickettsiennes chez quelques espèces de mollusques bivalves marins, Mercenaria mercenaria, Mya arenaria (Harshbarger et coll., 1977), Tellina tenuis (Buchanan, 1977), puis Crassostrea gigas (Comps et Coll., 1977), et Ostrea edulis (Comps et coll., 1977), un nouveau cas a été récemment observé chez Donax trunculus, petit coquillage abondant en certains points du rivage languedocien.
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/1978/publication-7143.pdf

Recherche sur l'agent de la maladie de la glande digestive de Ostrea edulis Linné
Provedor de dados: 5
Autores: Grizel, Henri; Comps, Michel; Bonami, Jean-robert; Cousserans, F.; Duthoit, Jean-louis; Le Pennec, Marie-annick.
Numerous diseases have been described in Ostrea and Crassostrea oysters and especially in cultivated species of commercial interest. The lack of growth, but more often mortalities, are in most cases the most obvious symptoms of this supposed sickness. The consequences of these epizooties can be so bad that they can result in the disappearance of an entire oyster population from a determined area as for Ostrea edulis L. in 1920-1921 (Dollfus, 1922) on some coasts of Europe and for Crassostrea angulata LMK in 1970-1971 on the French Atlantic coast and especially in the Marennes-Oléron and Arcachon basins. These cases can be considered as extreme cases as most of the time, oysters are only subjected to a number of episodic affections, affecting the farms only...
Tipo: Text
Palavras-chave: Glande digestive; Maladie; Pathologie; Ostrea edulis; Huître.
Ano: 1974
URL: http://archimer.ifremer.fr/doc/1974/publication-6286.PDF

Anomalies branchiales chez Crassostrea gigas (Thunberg)
Provedor de dados: 5
Autores: Comps, Michel.
A la suite de contrôles effectués à l'arrivée en France de Crassostrea gigas importées du Japon, de Corée et de Colombie Britannique, Marteil (1968) signalait chez ces huîtres la présence au niveau des branchies de lésions identiques à celles observées chez Crassostrea angulata Lmk. présentant les symptômes de la maladie des branchies décrite par L. Arvy et A. Franc (1968).
Tipo: Text
Palavras-chave: Huître; Crassostrea gigas; Pathologie; Maladie; Branchie.
Ano: 1969
URL: http://archimer.ifremer.fr/doc/00008/11971/8676.pdf

Maladie des branchies
Provedor de dados: 5
Autores: Comps, Michel.
Identification card of the diseases and parasites infecting fishes, crustaceans and molluscs, prepared in the framework of the CIEM workgroup on the pathology and diseases of marine organisms.
Tipo: Text
Palavras-chave: Histopathologie; Prophylaxie; Etiologie; Bivalves; Branchies; Maladies.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-6582.PDF

Etude morphologique de Marteilia christenseni sp.n. parasite du  lavignon Scrobicularia piperata P. (mollusque pelecypode).
Provedor de dados: 5
Autores: Comps, Michel.
The fine structure of the different stages of the life cycle of a new Marteilia, parasite of the pelecypod Scrobicularia piperata has been studied. The morphological characteristics of the tricellular spore and the differentiation of the cytoplasmic contents of the sporontes distinguish this parasite from other species of the genus Marteilia.
Tipo: Text
Palavras-chave: ANE; France New species Hosts Parasites.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/publication-1837.pdf

Infections virales chez les huîtres Crassostrea angulata Lmk. et Crassostrea gigas Th.
Provedor de dados: 5
Autores: Comps, Michel; Duthoit, Jean-louis.
Two viral infections associated to some epizooties have been observed in Crassostrea angulata Lmk. The first one concerns the Gill disease in which the viral damages go hand in hand with a cellular hypertrophy, while, in the second one, the contaminated cells are associated with a deterioration of the connective tissue. These branchial necrosis associated to a virus have been observed again recently in some Portuguese oysters from the natural deposits of the Cadix (Spain) area. Moreover, the study of the summer mortalities (July 1977) in the oyster Crassostrea gigas Th. demonstrated the presence in this species of a virus of the same type as the one associated to the massive mortalities of the Portuguese oyster. In both cases, the viral morphogenesis takes...
Tipo: Text
Palavras-chave: Oyster; Crassostrea gigas; Crassostrea angulata; Pathology; Virus; Huître; Crassostrea gigas; Crassostrea angulata; Pathologie; Virologie.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-5922.PDF

Virus-like particles in the retina of the seabram, Sparus aurata
Provedor de dados: 5
Autores: Comps, Michel; Raymond, Jean-christophe.
Cytoplasmic virus-like particles showing important similarities with the fish nodaviruses particles were found in nervous cells of the retina of hatchery-reared larval sea bream.
Tipo: Text
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00271/38250/36436.pdf

Recherches sur Bonamia ostreae gen. n., sp. n., parasite nouveau de l'huitre plate Ostrea edulis L
Provedor de dados: 5
Autores: Pichot, Yves; Comps, Michel; Tige, Gilbert; Grizel, Henri; Rabouin, Marie-agnès.
Unaccustomed mortalities were observed during spring 1979 in flat oysters of Ile-Tudy. A parasite was observed in the blood cells of the oysters causing gill ulcers.
Tipo: Text
Palavras-chave: France; ANE; Bonamia ostreae; Ostrea edulis; New species; Parasitic diseases; Oyster culture.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/publication-1833.pdf

Observations relatives a l'affection branchiale des huitres portugaises (Crassostrea Angulata LMK)
Provedor de dados: 5
Autores: Comps, Michel.
In the autumn of 1966, visible lesions were reported on the gills of Portuguese oysters raised in the Marennes-Oléron basin. Subsequently, various observers noted the presence of identical lesions on the oysters of Arcachon and the coasts of Brittany. A new oyster disease then appeared and with such an intensity that during the year 1967 the losses affected a large proportion of farmers' production. The disease's symptoms are visible, when first observed, on the gills and palpi. The gills show V-shaped indentations, rather deep and rather numerous, that give them a serrated look. Ultimately, the branchial layers can be quite distorted; all that is left then are very short fragments that have the appearance of stumps. These symptoms have been described in...
Tipo: Text
Ano: 1969
URL: http://archimer.ifremer.fr/doc/1969/publication-3159.pdf

Infection rickettsienne de l'huître plate
Provedor de dados: 5
Autores: Comps, Michel.
Tipo: Text
Palavras-chave: Ostrea edulis; Maladie; Etiologie; Prophylaxie et traitement; Histopathologie; Ostrea edulis; Disease; Etiology; Control; Histopathology.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00140/25077/23183.pdf

Contamination expérimentale de Mytilus galloprovincialis lmk par Marteilia refringens
Provedor de dados: 5
Autores: Comps, Michel; Joly, Jean-pierre.
Observées dès 1969 dans le bassin de Marennes-Oléron (Comps, 1970), les différentes phases du cycle de Marteilia refringens, parasite de la glande digestive de l'huître plate Ostrea edulis, ont été confirmées ultérieurement par une étude en microscopie électronique (Grizel, Comps, Bonami, Cousserans, Duthoit, et Le Pennec, 1974). Toutefois, la contamination expérimentale de sujets sains n'ayant pu être menée à bien, des doutes subsistaient quant à la possibilité pour le parasite de réaliser son cycle intégralement chez l'huître (Grizel et Coll., 1974), l'hypothèse d'un hôte intermédiaire ayant même été envisagée (Balouet, Chastel, Cahour et Poder, 1979).
Tipo: Text
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-7170.pdf

Infection virale associée à la "maladie des branchies" de l'huître portugaise Crassostrea angulata LmK
Provedor de dados: 5
Autores: Comps, Michel; Duthoit, Jean-louis.
Some particles and viral damages linked to a strong cellular hypertrophy have been observed in the branchial necrosis of some Portuguese oysters contaminated by the Gill disease. The structure and development of the virions, as well as the cellular alteration, are studied by electron microscopy.
Tipo: Text
Palavras-chave: Crassostrea angulata; Huître; Pathologie; Virologie.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/publication-5920.PDF

Virose de l'huître portugaise
Provedor de dados: 5
Autores: Comps, Michel.
Tipo: Text
Palavras-chave: Virose; Crassostrea angulata; Crassostrea gigas; Etiologie; Prophylaxie et traitement; Histopathologie; Virosis; Crassostrea angulata; Crassostrea gigas; Etiology; Control; Histopathology.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00140/25076/23182.pdf

Evolution de la mortalité des huîtres portugaises C. angulata dans le bassin de Marennes
Provedor de dados: 5
Autores: Comps, Michel; Gras, Paul.
A year after the end of the Gill disease which heavily struck the Portuguese oysters Cassostrea angulata Lmk. (Marteil, 1968), a new disease whose causes are still unexplained caused a massive mortality in the same species in the summer of 1970 (Comps, 1972). It can be considered, in 1973, that the successive losses lead to the quasi-extinction of the species C. angulata in the farms of the Marennes basin, since, contrary to what has been done in the case of the Malpèque disease in Canada, the indigenous specious was replaced by another species, the Pacific oyster Crassostrea gigas Thunberg.
Tipo: Text
Palavras-chave: Marennes Oléron; Huîtres; Mortalité; Crassostrea angulata.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/acte-5927.PDF

Haplosporidie parasite des branchies de l'huître palte Ostrea edulis L.
Provedor de dados: 5
Autores: Comps, Michel.
A yellowish mark of around 4 mm in diameter has been observed on the gill of a flat oyster from a batch in finishing process in a fattening pond (La Tremblade). With a magnifying glass, it has been described as a superficial necrosis of the gill. On the histological sections, we noticed that the gill structure was heavily disturbed: in the mark, several filament plicae had agglomerated in a compact mass joining the two gill sheets.
Tipo: Text
Palavras-chave: Haplosporidie; Pathologie; Histologie; Huître plate; Ostrea edulis.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/acte-5918.PDF

La mise en évidence d'une infection virale chez l'huître portugaise à l'occasion de l'épizootie de 1970-1974
Provedor de dados: 5
Autores: Comps, Michel; Bonami, Jean-robert; Vago, C.; Razet, Daniel.
Among the major epizootics known in marine Molluscs, the one that started on the coasts of Europe in 1970 in the Portuguese oyster, Crassostrea angulata, was certainly one of the largest due to its range and due to the economic loss sustained by the French oyster farming as a whole. It led to the disappearance of the species C. angulata as a farmed oyster, and to the massive introduction of the Japanese oyster, C. gigas, known to be resistant to the disease. From the first manifestations of this epizootic, the laboratories of the ISTPM were actively dedicated to its etiology. Now, after several years, a study begun at the La Tremblade laboratory has just been completed.
Tipo: Text
Palavras-chave: Marennes Oléron; Mortalités; Histologie; Epizootie; Crassostrea angulata.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/1976/publication-2995.pdf

Protiste parasite de l'huître du Pacifique Crassostrea gigas (Thumberg)
Provedor de dados: 5
Autores: Comps, Michel; Razet, Daniel; Quiroz-ramos, Hernando.
Following the "gill disease" of the Portuguese oyster (Crassostrea angulata LMK.) and the massive mortality rates that this species suffered in 1970 and 1971, the oyster farmers of the Marennes-Oléron basin, as those in other Portuguese oyster-producing areas, developed Pacific oyster (Crassostrea gigas) cultivation in France by directly importing spat from Japan's main supply centres.
Tipo: Text
Palavras-chave: Crassostrea gigas; Huîtres; Parasite; Protozoaire; Cytologie.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-2984.pdf

Observations sur les causes d'une mortalité anormale des huîtres plates (Ostrea edulis L.) dans le Bassin de Marennes
Provedor de dados: 5
Autores: Comps, Michel.
Il a été observé au cours de l'automne 1969 que des huîtres plates (Ostrea edulis L.) élevées et affinées dans des claires du bassin de Marennes périssaient d'une façon anormale. Il s'agissait d'huîtres importées de Bretagne en avril 1969 : âgées de 2 ans, elles avaient séjourné en parc, un an à Arcachon et 4 mois à Paimpol pour être ensuite immergées, à raison de 5/m2, dans des claires de la région de La Tremblade. Par ailleurs des pertes asses sensibles ont été constatées sur des lots d'huîtres provenant d'Arcachon, élevées également en claires à La Tremblade.
Tipo: Text
Palavras-chave: Ostréiculture; Huître plate; Ostrea edulis; Mortalité; Pathologie; Bassin Marennes Oléron; Charente Maritime.
Ano: 1970
URL: http://archimer.ifremer.fr/doc/00009/12005/8697.pdf

Développement de protistes parasites en culture cellulaire de l'huître japonaise Crassostrea gigas
Provedor de dados: 5
Autores: Cousserans, François; Bonami, Jean-robert; Comps, Michel; Grizel, Henri.
Cell cultures, which are the basis of numerous recent studies in medical pathology, have been, for a few years, of great interest in the studies carried out on the diseases affecting invertebrates. However, such cultures, dealing with marine bivalve molluscs, obtained for the first time by Vago and Chastang (1) and progressively improved since then [(2) to (10)], have not been used in pathological studies yet. As the diseases affecting marine molluscs of economic importance such as oysters are both of great interest and facing specific study difficulties, we tried to adapt oyster cell cultures to the study of the presence, development and cycles of the pathogenic or possibly pathogenic microorganisms affecting Crassostrea, and especially the species gigas,...
Tipo: Text
Palavras-chave: Culture cellule; Parasite; Huîtres; Crassostrea gigas.
Ano: 1974
URL: http://archimer.ifremer.fr/doc/1974/publication-5907.PDF

Recherches sur Haplosporidium sp. (Haplosporida - haplosporidiidae) parasite de l'huitre plate Ostrea edulis L.
Provedor de dados: 5
Autores: Pichot, Yves; Comps, Michel; Deltreil, Jean-pierre.
Tipo: Text
Palavras-chave: Ostrea edulis L.; Haplosporida; Biological Characteristics; Parasitology.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/1980/publication-1944.pdf

Observations préliminaires sur la reproduction des huîtres dans le bassin de Marennes-Oléron en 1971
Provedor de dados: 5
Autores: Gras, Paul; Comps, Michel; David, A.; Baron, G.
During the summer of 1970 mortality started in the Marennes-Oléron Basin which affected successively adult oysters, 18 year-old oysters and then the oyster spats collected the same year. Only the Portuguese oyster (Crassostrea angulata) was dying whereas the Pacific oyster (Crassostrea gigas) showed total resistance. The abnormal fixation of the 1970 spats, followed by an important mortality in this latter, and the large decrease of adult oyster stocks, and therefore of genitors, were also a reason for oyster farmers to worry as the new reproduction season was about to start. Some measures had to be taken in order to compensate for the lack of genitors susceptible of producing a tough and vivacious spat. The good results obtained for a few years with C....
Tipo: Text
Palavras-chave: Naissain; Larves; Marennnes Oléron; Crassostrea gigas; Reproduction.
Ano: 1971
URL: http://archimer.ifremer.fr/doc/1971/publication-6446.PDF

Mortalités estivales de l'huître Crassostrea gigas dans le bassin d'Arcachon : facteurs du milieu, aspects biochimiques et histologiques
Provedor de dados: 5
Autores: Maurer, Daniele; Comps, Michel.
Previous pathological studies have not permitted to implicate infectious disease in summer mortalities of oysters Crassostrea gigas, in the Arcachon bay. In 1983, these summer mortalities, occurring mostly among 1 year old oysters, have been the subject of new investigations. In order to establish the causes of mortalities, oysters of the same origin were held in two areas characterized by different prevalence of mortality for 6 months, during which measurements of physiological and biochemical condition and certain histological observations were made. The study has been completed by environmental observations. Different rates of mortality appeared between the two selected areas: 30 %in Taussat in the upper part of the bay, under a continental influence...
Tipo: Text
Palavras-chave: Histology; Biochemistry; Environment; Summer mortality; Crassostrea gigas; Histologie; Biochimie; Environnement; Mortalité estivale; Crassostrea gigas.
Ano: 1986
URL: http://archimer.ifremer.fr/doc/1986/publication-4317.pdf

Observations sur la reproduction des huîtres dans la Seudre (Bassin de Marennes-Oléron) en 1972
Provedor de dados: 5
Autores: Le Borgne, Annick; Gras, Paul; Comps, Michel; Razet, Daniel.
Après la mortalité massive de 19701-71 qui entraîna la quasi-disparition de l'huître portugaise (Crassostrea angulata), on assite depuis trois ans à l'extension de la culture de l'huître du Pacifique (Crassostrea gigas) dans le bassin de Marennes-Oléron. Cette espèces introduite en fait depuis 1966 montra durant la période de mortalité massive une vigueur et une résistance exceptionnelles, comparativement à l'huître portugaise.
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Crassostrea gigas; Reproduction; Bassin Marennes Oléron; Charente-Maritime.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/00009/12006/8698.pdf

Massive infections with fungus of the rotifer Brachionus plicatilis
Provedor de dados: 5
Autores: Comps, Michel; Menu, Bruno; Moreau, V.
Massive infections of a fungus exhibiting sorne characteristics of the Lagenidiaceae are described for the flfst time from rotifers (Brachionus plicatilis ) reared in a hatchery as food for fish larvae. This fungal agent was associated with mass mortalities in thc populations of cultivaled rolifers.
Tipo: Text
Ano: 1993
URL: http://archimer.ifremer.fr/doc/00271/38251/36437.pdf

Observations sur la résistance d'huîtres du genre Crassostrea au cours de la mortalité massive de 1970-1971 dans le bassin de Marennes-Oléron
Provedor de dados: 5
Autores: Comps, Michel.
Depuis plusieurs années on a constaté une baisse sensible de la productivité dans l'exploitation des parcs et claires à huîtres du bassin de Marennes-Oléron. En outre l'huître portugaise (Crassostrea angulata Lmk) élevée dans cette zone ostréicole devait subir en 1966 et 1967 les effets de la maladie des branchies qui entraîna des pertes appréciables (Franc &amp; Arvy, 1970). Au cours de l'été 1970, parallèlement à des perturbations dans la reproduction, s'amorça une mortalité massive qui au printemps 1971 affectait environ 70% du cheptel.
Tipo: Text
Palavras-chave: Ostréiculture; Huître; Crassostrea angulata; Crassostrea gigas; Physiologie; Pathologie; Mortalité; Marennes Oléron; Charente Maritime.
Ano: 1972
URL: http://archimer.ifremer.fr/doc/00009/11980/8684.pdf

Infections rickettsiennes chez les mollusques bivalves des côtes françaises
Provedor de dados: 5
Autores: Comps, Michel.
Des microorganismes de type rickettsien ont été observés dans les cellules secrétrices de l'épithélium digestif de différents coquillages des côtes françaises. Chez les huîtres Crassostrea gigas et Ostrea edulis et chez Donax trunculus, les germes sont de forme coccoide ; la réplication s'effectue par division binaire. Leurs caractéristiques permettent de les ranger parmi les Rickettsiales. Des rickettsies avec cycle intracellulaire ont été trouvées chez C. angulata et chez les pélécypodes Tapes decussatus et Scrobicularia piperata. Ces procaryotes montrent un cycle complexe de développement avec des corps élémentaires, intermédiaires et initiaux. Ce cycle est semblable à celui des Rickettsiela ou des Chlamydiales.
Tipo: Text
Palavras-chave: Mollusques; France; Pathologie; Rickettsie.
Ano: 1980
URL: http://archimer.ifremer.fr/doc/00016/12719/9632.pdf

Evolution des recherches et études récentes en pathologie des huîtres
Provedor de dados: 5
Autores: Comps, Michel.
Until recently, the study of the pathology of oysters concerned some bacterial and a large number of parsitic diseases. Among the latter, diseases caused by fungi such as Labyrinthomyxa marina or by sporozoa such as Minchinia nelsoni in the American oyster have had very important econimic repercussions in the affected areas. The causes of some severe epizooties, such as the "Malpecue Bay disease" in Canada, have never been determined; in other cases, including the mass mortality of the Portuguese oyster in Fance, several years of investigations have been required before the first results of an etiologic nature were obtained. The use of electron microscopy has permitted great strides in the pathology of oysters. Thus, virus diseases have been found to be...
Tipo: Text
Ano: 1978
URL: http://archimer.ifremer.fr/doc/00015/12631/9520.pdf

Une virose de l'huître portugaise (Crassostrea angulata LMK)
Provedor de dados: 5
Autores: Comps, Michel; Bonami, Jean-robert; Vago, Constantin.
Une infection virale a été observée chez les Huîtres portugaises Crassostrea angulata durant les mortalités massives de 1970-1973. Un type nouveau de virus et la morphogenèse virale sont décrits. Il s'agit du premier virus signalé chez les huîtres, mis en relation avec une épizootie de ce mollusque de ce mollusque économiquement très important.
Tipo: Text
Palavras-chave: Pathologie; Virologie; Mollusques bivalves; Crassostrea angulata.
Ano: 1976
URL: http://archimer.ifremer.fr/doc/00087/19820/17462.pdf

Bilan des essais d'acclimatation d'Ostrea chilensis sur les cotes de Bretagne.
Provedor de dados: 5
Autores: Grizel, Henri; Comps, Michel; Raguenes, D; Leborgne, Y; Tige, Gilbert; Martin, A.
Following the mass mortality of Ostrea edulis, some experiments were conducted with O. chilensis broodstock and spat coming from Chiloe Island (Chile). Concurrently, spat of th same species produced in a hatchery was cultivated. After a small period of growth, these oysters died during the summer. Microscopic observations showed Marteilia refringens and Bonamia ostreae in the oysters' tissue. For these reasons, Ostrea chilensis has not been retained to temporarily replace O. edulis.
Tipo: Text
Palavras-chave: ANE; France Bonamia ostreae Marteilia refringens Ostrea chilensis Ostrea edulis Bivalvia marine mollusks spat mortality parasites parasitic diseases acclimatization oyster culture.
Ano: 1982
URL: http://archimer.ifremer.fr/doc/1982/publication-1851.pdf

Micro-organismes de type Rickettsien chez les huîtres Crassostrea gigas Th. et Ostrea edulis L.
Provedor de dados: 5
Autores: Comps, Michel; Tige, Gilbert; Duthoit, Jean-louis; Grizel, Henri.
Some rickettsian infections have been found in French Atlantic oysters, Crassostrea gigas and Ostrea edulis. The micro-organisms parasite the digestive diverticulum epithelium cells although not creating any damage that could strongly affect the molluscs. If not for its shape, which appears to be longer in the case of the Crassostrea gigas Rickettsia, the characteristics of these two micro-organisms seem pretty close and enabled their inclusion in the Rickettsial order.
Tipo: Text
Palavras-chave: Rickettia; Ostrea edulis; Crassostrea gigas; Huîtres; Pathologie; Infections.
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/acte-6173.PDF

Ultrastructural study of sporulated instars of a haplosporidian parasitizing the clam Ruditapes decussatus
Provedor de dados: 5
Autores: Chagot, Dominique; Bachere, Evelyne; Ruano, Francisco; Comps, Michel; Grizel, Henri.
In 1951, Vilela pointed out the presence of a haplosporidian parasitizing Ruditapes decussatus from Portuguese waters and created the species Haplosporidium tapetis. Later, a haplosporidian was found in the same species originating from the pound of Thau (France).
Tipo: Text
Palavras-chave: Haplosporidian paratizing; Ruditapes decussatus; Pathology.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-3110.pdf

Etude du cycle de Marteilia refringens dans l'Etang de Thau
Provedor de dados: 5
Autores: Comps, Michel.
Since the beginning of the epizooty of the flat oyster Ostrea edulis on the Atlantic coast (Comps, 1970), it has been observed that the parasitosis did not develop in the Mediterranean Sea in oysters from the Thau lagoon even though a large part of the culture is made up of young oysters from Brittany. However, some episodic studies only rarely found the presence of Marteilia refringens in the oysters from the lagoon.
Tipo: Text
Palavras-chave: Marteilia refringens; Ostrea edulis; Pathologie; Parasite.
Ano: 1979
URL: http://archimer.ifremer.fr/doc/1979/acte-6078.PDF

Etude d'un parasite de la glande digestive observé au cours de l'épizootie actuelle de l'huître plate
Provedor de dados: 5
Autores: Grizel, Henri; Comps, Michel; Cousserans, François; Bonami, Jean-robert; Vago, Constantin.
Description, in electron microscopy, of the stages of a parasite observed in the digestive gland of the oyster Ostrea edulis during the epizooties which are currently spreading throughout flat oyster farms.
Tipo: Text
Palavras-chave: Pathologie; Ostrea edulis; Huitre; Epizootie; Parasite.
Ano: 1974
URL: http://archimer.ifremer.fr/doc/1974/publication-5921.PDF

Presence d'une coccidie parasite du rein chez Ostrea edulis L.
Provedor de dados: 5
Autores: Tige, Gilbert; Comps, Michel; Grizel, Henri.
A Coccidia parasite of the kidney cells has been observed in the flat oyster O. edulis. This Sporozoa does not seem to cause any serious damage to the oyster.
Tipo: Text
Palavras-chave: ANE; France Ostrea edulis Parasitism.
Ano: 1977
URL: http://archimer.ifremer.fr/doc/1977/publication-1970.pdf

Sur une tumeur du manteau de Crassostrea gigas (Thunberg)
Provedor de dados: 5
Autores: Comps, Michel; Quiros-ramos, Hernando; Razet, Daniel.
A tumor of the mantle has been found in Crassostrea gigas coming from oyster-bed of Marennes-Oleron basin. Near the tumor, the shells show a malformation. Microscopic examination shows the connective nature of this tumor, it was covered with an epithelium and consisted of several sinuses filled with leucocytes.
Tipo: Text
Palavras-chave: Shell; Tumor; Mantle; Crassostrea gigas.
Ano: 1973
URL: http://archimer.ifremer.fr/doc/1973/publication-2150.pdf

Situation zoosanitaire des coquillages en Méditerranée (1985-1987)
Provedor de dados: 5
Autores: Comps, Michel; Pichot, Yves.
A zoosanitary survey of the mussels and of the oysters from the mediterranean coast (Languedoc-Roussillon and Corse) has been carried out from 1985 unti11987. This period has been characterized by the stabilization of the enzootie infection caused by Marteilia maurini in the mussel Mytilus galloprovincialis and by the introduction of Bonamia ostreae in the laguna of Thau. New infections (with Rickettsia and Haplosporida) have been observed in the mus sels.
Tipo: Text
Palavras-chave: Zoosanitaire; Parasite; Lésion; Zoosanitary; Parasite; Lesion.
Ano: 1989
URL: http://archimer.ifremer.fr/doc/00408/51928/52553.pdf

Maladie de la glande digestive de l'huître plate
Provedor de dados: 5
Autores: Comps, Michel.
Tipo: Text
Palavras-chave: Ostrea edulis; Etiologie; Prophylaxie et traitement; Histopathologie; Ostrea edulis; Etiology; Control; Histopathology.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/00140/25079/23187.pdf