Detection of piscine orthoreoviruses (PRV-1 and PRV-3) in Atlantic salmon and rainbow trout farmed in Germany

Research output: Research - peer-reviewJournal article – Annual report year: 2018

DOI

  • Author: Adamek, Mikolaj

    University of Veterinary Medicine Hannover, Foundation, Germany

  • Author: Hellmann, John

    North Rhine Westphalian State Agency for Nature, Environment and Consumer Protection, Germany

  • Author: Flamm, Agnes

    Hesse State Laboratory, Control of Fish Diseases, Germany

  • Author: Teitge, Felix

    University of Veterinary Medicine Hannover, Foundation, Germany

  • Author: Vendramin, Niccolò

    Fish Diseases, Division for Diagnostics & Scientific Advice, Public Sector Consultancy, National Institute of Aquatic Resources, National Veterinary Institute, Technical University of Denmark, Kemitorvet, 2800, Kgs. Lyngby, Denmark

  • Author: Fey, Daniel

    North Rhine Westphalian State Agency for Nature, Environment and Consumer Protection, Germany

  • Author: Riße, Karin

    Hesse State Laboratory, Control of Fish Diseases, Germany

  • Author: Blakey, Franziska

    Hesse State Laboratory, Control of Fish Diseases, Germany

  • Author: Rimstad, Espen

    Norwegian University of Life Sciences, Norway

  • Author: Steinhagen, Dieter

    University of Veterinary Medicine Hannover, Foundation, Germany

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Piscine orthoreoviruses (PRVs) are emerging pathogens causing circulatory disorders in salmonids. PRV-1 is the etiological cause of heart and skeletal muscle inflammation (HSMI) in farmed Atlantic salmon (Salmo salar), characterized by epicarditis, inflammation and necrosis of the myocardium, myositis and necrosis of red skeletal muscle. In 2017, two German breeding farms for Atlantic salmon and rainbow trout (Oncorhynchus mykiss), respectively, experienced disease outbreaks with mortalities of 10% and 20%. The main clinical signs were exhaustion and lethargic behavior. During examinations, PRV-1 in the salmon and the PRV-3 in trout were detected for the first time in Germany. Further analyses also indicated the presence of Aeromonas salmonicida in internal tissues of both species. While PRV-1 could be putatively linked with the disease in Atlantic salmon, most of the rainbow trout suffered from an infection with A. salmonicida and not with PRV-3. Interestingly, the sequence analysis suggests that the German PRV-3 isolate is more similar to a Chilean PRV-3 isolate from Coho salmon (Oncorhynchus kisutch) than to PRV-3 from rainbow trout from Norway. This indicates a wide geographic distribution of this virus or dispersal by global trade. These findings indicate that infections with PRVs should be considered when investigating disease outbreaks in salmonids. This article is protected by copyright. All rights reserved.
Original languageEnglish
JournalTransboundary and Emerging Diseases
Number of pages12
ISSN1865-1674
DOIs
StateAccepted/In press - 2018
CitationsWeb of Science® Times Cited: No match on DOI

    Research areas

  • Aeromonas salmonicida, HSMI, PRV, PRV-1, PRV-3, PRV-Om, Heart and skeletal muscle inflammation, Piscine orthoreoviruses
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