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    Home > Active Ingredient News > Immunology News > eLife: Scientists find a variety of new pathogenic viruses in salmon!

    eLife: Scientists find a variety of new pathogenic viruses in salmon!

    • Last Update: 2020-06-22
    • Source: Internet
    • Author: User
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    , June 18, 2020 /PRNewswire/ --Biovalley
    BIOON/-- Key species are those plants and animals that play a key role in supporting the ecosystems in which they live, so protecting them is a top priorityChinook salmon and red salmon (two salmon) are two such speciesThese fish play an important role in the coastal ecosystem of the north-eastern Pacific Ocean and have supported the native inhabitants for thousands of yearsthe number of Chinook salmon and red salmon has fallen sharply over the past three decadesVirus infection may be a factor in this declineSo far, most studies of salmonella-infected viruses have focused on fishborne virusesThe virus, which causes "heart and skeletal muscle inflammation" (HSMI) of Atlantic salmon, can wreak havoc on cultured populationsHowever, PRV does not have the same pathogenic effect on Chinugan salmon and red salmonpicture source: Over the past decade, with advances in DNA sequencing technology, many new viruses have been discovered, and researchers from the University of British Columbia (UBC), the Canadian Department of Fisheries and Oceans, the Pacific Salmon Foundation, and others have used these technologies to find new viruses in Pacific salmon, such as MordecaiThey found three new viruses in the endangered Chinook and salmon populations, including one that had never previously been shown to infect fishThe results of the study were published in September 2019 in eLifeto find the virus from dead and dying salmon on the farm, researchers used DNA sequencing and testing of each virus to screen more than 6,000 salmon off the coast of British Columbia, including wild, hatched and aquaculture fishSurprisingly, researchers have discovered three previously unknown virusesA new virus, more common lying at salmon hatcheries, infects more than 15 percent of all detected Chinook hatchersIn general, new viruses are more common in farmed fish than in wild fish Another new virus has been detected in 20 per cent of The noucin fish in fisheries, but only in adult or subadult salmon next, they screened the viruses in farmed salmon, hatcher salmon and wild salmon to determine their distribution Two of these viruses are found in fish from these three sources, and one of them is found only in farmed fish The fact that the three viruses are distributed differently raises the question of how the virus spreads within and between cultures, hatcheries and wild salmon populations photo source: All three viruses found are related to viruses known to cause serious diseasein in other animals, but one virus is particularly unexpected to researchers "We were surprised to find a virus that has never been shown to be infected with fish before," said Gideon Mordecai, a researcher at The Department of Earth, Oceanic and Atmospheric Sciences of British Columbia Although there is no risk to humans, one of the viruses has evolved to be associated with the respiratory coronavirus and is located at the crucifier This suggests that it has a similar infection strategy to distant relatives of infected mammals "We found that the new virus is widely distributed in dead and dying farmed salmon and wild salmon," said Curtis Suttle, a virologist at the University of British Columbia at the It highlights the potential role that viral diseases may play in the dynamics of wild fish stocks and the threat these viruses may pose to the aquaculture industry "We have to determine whether these viruses are a significant factor in the decline in chinuk salmon and red salmon," Suttle said The study highlights the need for enhanced surveillance to improve our understanding of how the virus may affect the health of wild Pacific salmon populations image source: These findings will help efforts to protect salmon and shed light on the extent to which these viruses exist in wild salmon populations Future work will focus on identifying the risks posed by these viruses to salmon health and investigating the possibility of exchange between hatcheries, cultured and wild salmon stocks While farmed salmon may pose some risks of transmission to wild salmon, they also provide an opportunity to study disease processes that are not easily observed in wild salmon In turn, these data can be used to develop policies to minimize the impact of these infectious diseases and to improve the survival of wild salmon populations (BioValleyBioon.com) References: 1 Mordecai G J, Miller K M, Di Cicco E, et al.
    Endangered wild salmon by newly discovered viruses
    .J.eLife, 2019, 8.
    "2
    New Viruses Discover in Endangered Wild Pacific Salmon Population 3) Scientists Discover Three New Viruses That Infect San Endanger salmon 4
    viruss find in endangered wild pacific salmon population
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