The Experts below are selected from a list of 5841 Experts worldwide ranked by ideXlab platform
Sara Ciulli - One of the best experts on this subject based on the ideXlab platform.
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viral nervous necrosis outbreaks caused by the rgnnv sjnnv reassortant betanodavirus in gilthead Sea bream sparus aurata and European Sea Bass dicentrarchus labrax
Aquaculture, 2020Co-Authors: Enrico Volpe, Andrea Gustinelli, Monica Caffara, Francesca Errani, Francesco Quaglio, Marialetizia Fioravanti, Sara CiulliAbstract:Abstract Mediterranean marine aquaculture has suffered significant economic losses due to viral nervous necrosis (VNN) outbreaks mainly caused by different RGNNV betanodavirus strains. In recent years, the marine aquaculture sector has experienced the emergence of the RGNNV/SJNNV reassortant betanodavirus, harbouring the RNA1 segment of RGNNV genotype and the RNA2 segment of SJNNV genotype. So far, the reassortant strains caused massive mortality outbreaks in gilthead Sea bream (Sparus aurata) larvae sparing the European Sea Bass (Dicentrarchus labrax). In this study, multiple mortality outbreaks occurred in one Italian marine hatchery involving both European Sea Bass and gilthead Sea bream at different life stages were investigated through a complete microbiological and molecular analysis. Gilthead Sea bream larvae and juveniles have recorded the highest mortality rates, however, both European Sea Bass and gilthead Sea bream incurred a RGNNV/SJNNV reassortant betanodavirus persistent infection, able to act as asymptomatic carriers and viral source for susceptible fish. These new epidemiological data on nervous necrosis virus (NNV) reassortant infection provide precious advice on how to manage fish to reduce VNN spread in Mediterranean aquaculture. Evidence of interspecies transmission of RGNNV/SJNNV reassortant strains and the persistent infection in both European Sea Bass and gilthead Sea bream, point out the importance to enforce a wide surveillance and a strict biosecurity programme addressing both RGNNV and reassortant RGNNV/SJNNV betanodaviruses in Mediterranean European Sea Bass and gilthead Sea bream farms. Furthermore, the presence assessment of betanoviruses in all newly-introduced fish batches in the farm, regardless of the species and a strict segregation between European Sea Bass and gilthead Sea bream batches within farms can significantly reduce the risk of NNV transmission. Finally, surviving fish can act as carrier fish, and thereby must be segregated from other batches and protected from stress conditions that could trigger a new clinical phase.
Enrico Volpe - One of the best experts on this subject based on the ideXlab platform.
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viral nervous necrosis outbreaks caused by the rgnnv sjnnv reassortant betanodavirus in gilthead Sea bream sparus aurata and European Sea Bass dicentrarchus labrax
Aquaculture, 2020Co-Authors: Enrico Volpe, Andrea Gustinelli, Monica Caffara, Francesca Errani, Francesco Quaglio, Marialetizia Fioravanti, Sara CiulliAbstract:Abstract Mediterranean marine aquaculture has suffered significant economic losses due to viral nervous necrosis (VNN) outbreaks mainly caused by different RGNNV betanodavirus strains. In recent years, the marine aquaculture sector has experienced the emergence of the RGNNV/SJNNV reassortant betanodavirus, harbouring the RNA1 segment of RGNNV genotype and the RNA2 segment of SJNNV genotype. So far, the reassortant strains caused massive mortality outbreaks in gilthead Sea bream (Sparus aurata) larvae sparing the European Sea Bass (Dicentrarchus labrax). In this study, multiple mortality outbreaks occurred in one Italian marine hatchery involving both European Sea Bass and gilthead Sea bream at different life stages were investigated through a complete microbiological and molecular analysis. Gilthead Sea bream larvae and juveniles have recorded the highest mortality rates, however, both European Sea Bass and gilthead Sea bream incurred a RGNNV/SJNNV reassortant betanodavirus persistent infection, able to act as asymptomatic carriers and viral source for susceptible fish. These new epidemiological data on nervous necrosis virus (NNV) reassortant infection provide precious advice on how to manage fish to reduce VNN spread in Mediterranean aquaculture. Evidence of interspecies transmission of RGNNV/SJNNV reassortant strains and the persistent infection in both European Sea Bass and gilthead Sea bream, point out the importance to enforce a wide surveillance and a strict biosecurity programme addressing both RGNNV and reassortant RGNNV/SJNNV betanodaviruses in Mediterranean European Sea Bass and gilthead Sea bream farms. Furthermore, the presence assessment of betanoviruses in all newly-introduced fish batches in the farm, regardless of the species and a strict segregation between European Sea Bass and gilthead Sea bream batches within farms can significantly reduce the risk of NNV transmission. Finally, surviving fish can act as carrier fish, and thereby must be segregated from other batches and protected from stress conditions that could trigger a new clinical phase.
Giulia Maricchiolo - One of the best experts on this subject based on the ideXlab platform.
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intestinal alterations in European Sea Bass dicentrarchus labrax linnaeus 1758 exposed to microplastics preliminary results
Environmental Pollution, 2016Co-Authors: Cristina Peda, Lucrezia Genovese, Letteria Caccamo, Maria Cristina Fossi, Francesco Gai, Franco Andaloro, Anna Perdichizzi, Teresa Romeo, Giulia MaricchioloAbstract:Abstract This study investigates, for the first time, the intestinal responses of European Sea Bass Dicentrarchus labrax chronically exposed to microplastics through ingestion. Fish (n = 162) were fed with 3 different treatment diets for 90 days: control, native polyvinyl chloride (PVC) and polluted polyvinyl chloride (PVC) pellets. Intestines were fixed and processed for histological analysis using standard techniques. Histopathological alterations were examined using a score value (from 0 to 4). The distal part of intestine in all samples proved to be the most affected by pathological alterations, showing a gradual change varying from moderate to severe related to exposure times. The histological picture that characterizes both groups especially after 90 days of exposure, suggests that the intestinal functions can be in some cases totally compromised. The worst condition is increasingly evident in the distal intestine of fish fed with polluted PVC pellets respect to control groups (p These first results underline the need to assess the impact of increasing microplastics pollution on the marine trophic web.
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intestinal alterations in European Sea Bass dicentrarchus labrax linnaeus 1758 exposed to microplastics preliminary results
Environmental Pollution, 2016Co-Authors: Cristina Peda, Lucrezia Genovese, Letteria Caccamo, Maria Cristina Fossi, Francesco Gai, Franco Andaloro, Anna Perdichizzi, Teresa Romeo, Giulia MaricchioloAbstract:This study investigates, for the first time, the intestinal responses of European Sea Bass Dicentrarchus labrax chronically exposed to microplastics through ingestion. Fish (n = 162) were fed with 3 different treatment diets for 90 days: control, native polyvinyl chloride (PVC) and polluted polyvinyl chloride (PVC) pellets. Intestines were fixed and processed for histological analysis using standard techniques. Histopathological alterations were examined using a score value (from 0 to 4). The distal part of intestine in all samples proved to be the most affected by pathological alterations, showing a gradual change varying from moderate to severe related to exposure times. The histological picture that characterizes both groups especially after 90 days of exposure, suggests that the intestinal functions can be in some cases totally compromised. The worst condition is increasingly evident in the distal intestine of fish fed with polluted PVC pellets respect to control groups (p < 0.05) to different exposure times. These first results underline the need to assess the impact of increasing microplastics pollution on the marine trophic web.
Francesca Errani - One of the best experts on this subject based on the ideXlab platform.
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viral nervous necrosis outbreaks caused by the rgnnv sjnnv reassortant betanodavirus in gilthead Sea bream sparus aurata and European Sea Bass dicentrarchus labrax
Aquaculture, 2020Co-Authors: Enrico Volpe, Andrea Gustinelli, Monica Caffara, Francesca Errani, Francesco Quaglio, Marialetizia Fioravanti, Sara CiulliAbstract:Abstract Mediterranean marine aquaculture has suffered significant economic losses due to viral nervous necrosis (VNN) outbreaks mainly caused by different RGNNV betanodavirus strains. In recent years, the marine aquaculture sector has experienced the emergence of the RGNNV/SJNNV reassortant betanodavirus, harbouring the RNA1 segment of RGNNV genotype and the RNA2 segment of SJNNV genotype. So far, the reassortant strains caused massive mortality outbreaks in gilthead Sea bream (Sparus aurata) larvae sparing the European Sea Bass (Dicentrarchus labrax). In this study, multiple mortality outbreaks occurred in one Italian marine hatchery involving both European Sea Bass and gilthead Sea bream at different life stages were investigated through a complete microbiological and molecular analysis. Gilthead Sea bream larvae and juveniles have recorded the highest mortality rates, however, both European Sea Bass and gilthead Sea bream incurred a RGNNV/SJNNV reassortant betanodavirus persistent infection, able to act as asymptomatic carriers and viral source for susceptible fish. These new epidemiological data on nervous necrosis virus (NNV) reassortant infection provide precious advice on how to manage fish to reduce VNN spread in Mediterranean aquaculture. Evidence of interspecies transmission of RGNNV/SJNNV reassortant strains and the persistent infection in both European Sea Bass and gilthead Sea bream, point out the importance to enforce a wide surveillance and a strict biosecurity programme addressing both RGNNV and reassortant RGNNV/SJNNV betanodaviruses in Mediterranean European Sea Bass and gilthead Sea bream farms. Furthermore, the presence assessment of betanoviruses in all newly-introduced fish batches in the farm, regardless of the species and a strict segregation between European Sea Bass and gilthead Sea bream batches within farms can significantly reduce the risk of NNV transmission. Finally, surviving fish can act as carrier fish, and thereby must be segregated from other batches and protected from stress conditions that could trigger a new clinical phase.
Francesco Quaglio - One of the best experts on this subject based on the ideXlab platform.
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viral nervous necrosis outbreaks caused by the rgnnv sjnnv reassortant betanodavirus in gilthead Sea bream sparus aurata and European Sea Bass dicentrarchus labrax
Aquaculture, 2020Co-Authors: Enrico Volpe, Andrea Gustinelli, Monica Caffara, Francesca Errani, Francesco Quaglio, Marialetizia Fioravanti, Sara CiulliAbstract:Abstract Mediterranean marine aquaculture has suffered significant economic losses due to viral nervous necrosis (VNN) outbreaks mainly caused by different RGNNV betanodavirus strains. In recent years, the marine aquaculture sector has experienced the emergence of the RGNNV/SJNNV reassortant betanodavirus, harbouring the RNA1 segment of RGNNV genotype and the RNA2 segment of SJNNV genotype. So far, the reassortant strains caused massive mortality outbreaks in gilthead Sea bream (Sparus aurata) larvae sparing the European Sea Bass (Dicentrarchus labrax). In this study, multiple mortality outbreaks occurred in one Italian marine hatchery involving both European Sea Bass and gilthead Sea bream at different life stages were investigated through a complete microbiological and molecular analysis. Gilthead Sea bream larvae and juveniles have recorded the highest mortality rates, however, both European Sea Bass and gilthead Sea bream incurred a RGNNV/SJNNV reassortant betanodavirus persistent infection, able to act as asymptomatic carriers and viral source for susceptible fish. These new epidemiological data on nervous necrosis virus (NNV) reassortant infection provide precious advice on how to manage fish to reduce VNN spread in Mediterranean aquaculture. Evidence of interspecies transmission of RGNNV/SJNNV reassortant strains and the persistent infection in both European Sea Bass and gilthead Sea bream, point out the importance to enforce a wide surveillance and a strict biosecurity programme addressing both RGNNV and reassortant RGNNV/SJNNV betanodaviruses in Mediterranean European Sea Bass and gilthead Sea bream farms. Furthermore, the presence assessment of betanoviruses in all newly-introduced fish batches in the farm, regardless of the species and a strict segregation between European Sea Bass and gilthead Sea bream batches within farms can significantly reduce the risk of NNV transmission. Finally, surviving fish can act as carrier fish, and thereby must be segregated from other batches and protected from stress conditions that could trigger a new clinical phase.
