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| Registros recuperados: 112 | |
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| Pelayo Sánchez, Gabriela. |
| Se evaluó el efecto de seis concentraciones de conidios de Penicillium digitatum con el objetivo de determinar la concentración óptima que permita 100% de infección en frutos de limón persa en postcosecha. El hongo se aisló de frutos de limón mexicano del estado de Colima, Méx. Cada concentración (1 x 105, 3 x 105, 5 x 105, 7 x 105, 9 x 105, 1 x 106 esporas mL-1), se colocó en heridas de 2 mm profundidad x 1mm de ancho, aproximadamente, hechas en frutos en etapa de madurez de corte. Las concentraciones 1 x 105 y 3 x 105 esporas mL-1 mostraron una incidencia de 33 y 50 % de infección, respectivamente, mientras que los frutos inoculados con 5 x 105, 7 x 105, 9 x 105 y 1 x 106 esporas mL-1 presentaron 100% de incidencia de la enfermedad. Asimismo, se... |
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Palavras-chave: Esporas; Concentración; Infección; Control; Fungicidas; Eficiencia; Spores; Concentration; Infection; Fungicides; Efficiency; Fitopatología; Maestría. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/1684 |
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| Fuhrmann, Marine; Petton, Bruno; Quillien, Virgile; Faury, Nicole; Morga, Benjamin; Pernet, Fabrice. |
| Mortality of young Pacific oysters Crassostrea gigas associated with the ostreid herpesvirus 1 (OsHV-1) is occurring worldwide. Here, we examined for the first time the effect of salinity on OsHV-1 transmission and disease-related mortality of C. gigas, as well as salinity-related effects on the pathogen itself. To obtain donors for OsHV-1 transmission, we transferred laboratory-raised oysters to an estuary during a disease outbreak and then back to the laboratory. Oysters that tested OsHV-1 positive were placed in seawater tanks (35‰, 21°C). Water from these tanks was used to infect naïve oysters in 2 experimental setups: (1) oysters acclimated or non-acclimated to a salinity of 10, 15, 25 and 35‰ and (2) oysters acclimated to a salinity of 25‰; the... |
| Tipo: Text |
Palavras-chave: Bivalve; Herpesviridae; Infection; Disease transmission; Risk analysis. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00350/46100/45781.pdf |
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| Renault, Tristan. |
| Bivalve molluscs are filter feeders and as a consequence they may bioaccumulate in their tissues viruses that infect humans and higher vertebrates. However, there have also been described mortalities of bivalve molluscs associated with viruses belonging to different families. Mass mortalities of adult Portuguese oysters, Crassostrea angulata, among French livestocks (between 1967 et 1973) were associated with irido-like virus infections. Herpesviruses were reported in the eastem oyster, Pacific oyster and European flat oyster and lately in scallops and clams. Disseminated neoplasia, a proliferative cell disorder of the circulatory system of bivalves, although of uncertain aetiology, has been suggested to be caused by retroviral infections. Other viruses... |
| Tipo: Text |
Palavras-chave: Infection; Virus; Mollusc; Bivalve; Infection; Virus; Mollusque; Bivalve. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-2925.pdf |
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| Macé, Sabrina; Truelstrup Hansen, Lisbeth; Rupasinghe, H. P. Vasantha. |
| Background: Worldwide, Streptococcus pyogenes is the leading cause of bacterial pharyngitis. To reduce the use of antibiotics, antimicrobial phytochemical-containing remedies, which have long been in use in traditional medicine, may provide new approaches for management of streptococcal pharyngitis. The objective of this study was to assess the inhibitory activities of 25 natural phenolic compounds against three strains of S. pyogenes. Methods: After an initial screening, the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of the nine most effective phenolic compounds were determined. The effect of four compounds with the lowest MIC and MBC on streptococcal growth and biofilm formation was also studied. Results:... |
| Tipo: Text |
Palavras-chave: Pharyngitis; Strep throat; Biofilm; Naphthoquinone; Infection; Disease; Polyphenols. |
| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00603/71515/69934.pdf |
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| Martenot, Claire; Faury, Nicole; Morga, Benjamin; Degremont, Lionel; Lamy, Jean-baptiste; Houssin, Maryline; Renault, Tristan. |
| Viral entry mechanisms of herpesviruses constitute a highly complex process which implicates several viral glycoproteins and different receptors on the host cell surfaces. This initial infection stage was currently undescribed for Ostreid herpes virus 1 (OsHV-1), a herpesvirus infecting bivalves including the Pacific oyster, Crassostrea gigas. To identify OsHV-1 glyproteins implicated in the attachment of the virus to oyster cells, three viral putative membrane proteins, encoded by ORF 25, 41, and 72, were selected and polyclonal antibodies against these targets were used to explore first interactions between the virus and host cells. In addition, effects of dextran sulfate, a negative charged sulfated polysaccharide, were investigated on OsHV-1 infection.... |
| Tipo: Text |
Palavras-chave: OsHV-1; Antiviral antibodies; Dextran sulfate; Interaction; Crassostrea gigas; Infection. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00501/61273/64847.pdf |
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| Renault, Tristan; Cochennec, Nathalie; Grizel, Henri. |
| The protozoan Bonamia ostreae (Ascetospora) is the etiological agent of bonamiosis, or hemocyte disease of the European fiat oyster, Ostrea edulis (Pichot et al., 1980). Since this infection was first reported from the coast of Brittany (Comps et al., 1980), the parasite has spread rapidly along the French Atlantic coasts (Grizel & Tigé, 1982), and in the European countries including the UK, Holland, lreland and Spain (Bannister & Key, 1982; Van Banning, 1982; Polanco et al., 1984). Under the EEC Council Directive 91/67, this parasitic protozoan is included in list II of Annex A. Serious pathogen agents for molluscs that should be obligatorily declared are placed in this list |
| Tipo: Text |
Palavras-chave: Infection; Protozoan; Oyster; Ostrea edulis; Bonamia ostreae. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/1995/publication-2892.pdf |
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| Arzul, Isabelle. |
| Depuis 1991, d'importantes mortalités sont observées chez des lots de larves et de naissain d'huître creuse, Crassostrea gigas, mais également sur des lots de larves d'autres espèces de bivalve telles que, l'huître plate, Ostrea edulis, les palourdes, Ruditapes decussatus et Ruditapes philippinarum. Ces épizooties se produisent plus généralement à fortes températures en écloserie-nurserie et en période estivale dans le milieu naturel. Les techniques de détection utilisées jusqu'alors pour rechercher ces infections virales, histologie et microscopie électronique à transmission, paraissent assez inadaptées, tant du fait de leur sensibilité, du temps qu'elles nécessitent et de leur coût. Aussi, le laboratoire IFREMER de Ronce les Bains (Charente-Maritime) a... |
| Tipo: Text |
Palavras-chave: Mollusques; Bivalves; Crassostrea gigas; Huître japonaise; Pathologie; Herpèsvirus; Infection; Expérimentation. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00108/21957/19551.pdf |
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| Renault, Tristan; Novoa, Beatriz. |
| Bivalve molluscs are filter feeders and as a consequence they may bioaccumulate in their tissues viruses that infect humans and higher vertebrates. However, there have also been described mortalities of bivalve molluscs associated with viruses belonging to different families. Mass mortalities of adult Portuguese oysters, Crassostrea angulata, among French livestocks (between 1967 and 1973) were associated with irido-like virus infections. Herpesviruses were reported in the eastern oyster, Pacific oyster and European flat oyster and lately in scallops and clams. Disseminated neoplasia, a proliferative cell disorder of the circulatory system of bivalves, although of uncertain aetiology, has been suggested to be caused by retroviral infections. Other viruses... |
| Tipo: Text |
Palavras-chave: Infection; Virus; Molluscs; Bivalves. |
| Ano: 2004 |
URL: https://archimer.ifremer.fr/doc/2004/publication-2910.pdf |
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| Renault, Tristan; Cochennec, Nathalie; Le Deuff, Rose-marie; Chollet, Bruno; Maffart, Patricia; Haffner, Philippe; Berthe, Franck; Thuillier, Benoit. |
| Le but de ce programme pathologie est de recherher et d'étudier les agents pathogènes connus et inconnus chez les mollusques bivalves marins, plus particulièrement chez l'huître creuse, Crassastrea gigas, afin d'identifier d'éventuels agents causant des mortalité, de proposer des mesures prophylactiques et de définir des conditions zootechniques permettant aux professionnels de limiter l'impact des maladies sur leur cheptel. La présence de maladies, chez les mollusques bivalves marins dont l'impact socioéconomique peut être catastrophique pour les productions conchylicoles, et l'accroissement des échanges de produits d'aquaculture entre les pays de la CEE et avec les pays tiers nécessitent le renforcement des recherches dans les domaines de la pathologie.... |
| Tipo: Text |
Palavras-chave: Pathologie; Agent pathogène; Infection; Virus; Herpèsvirus; Purification; Huître creuse; Crassostrea gigas. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00044/15502/12874.pdf |
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| Ben Cheikh, Yosra; Travers, Marie-agnes; Le Foll, Frank. |
| The pathogenic strain V. splendidus 10/068 1T1 has previously been reported for its virulence to the blue mussel and for its capacity to alter immune responses. In this study, we expanded the knowledge on hemocyte-pathogen interactions by using in vitro and in vivo assays. V. splendidus 10/068 1T1 severely inhibited cell adhesion and acidic vacuole formation unlike the innocuous phylogenetically related V. splendidus 12/056 M24T1 which had no effect on these cell functions. Furthermore, the virulent bacteria decreased hemocyte viability (59% of viability after 24 h). Infection dynamics were explored by using a model based on water tank cohabitation with septic mussels infected by GFP-tagged V. splendidus 10/068 1T1. Experimental infections were... |
| Tipo: Text |
Palavras-chave: Innate immunity; Bivalves; Vibrio; Infection; Experimental model; Hemocyte. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00400/51136/53772.pdf |
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| Registros recuperados: 112 | |
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