Quantification of piscine reovirus (PRV) at different stages of Atlantic salmon Salmo salar production

Diseases of Aquatic Organisms
M LøvollTorstein Tengs

Abstract

The newly described piscine reovirus (PRV) appears to be associated with the development of heart and skeletal muscle inflammation (HSMI) in farmed Atlantic salmon Salmo salar L. PRV seems to be ubiquitous among fish in Norwegian salmon farms, but high viral loads and tissue distribution support a causal relationship between virus and disease. In order to improve understanding of the distribution of PRV in the salmon production line, we quantified PRV by using real-time PCR on heart samples collected at different points in the life cycle from pre-smolts to fish ready for slaughter. PRV positive pre-smolts were found in about 36% of the freshwater cohorts and a general increase in viral load was observed after their transfer to seawater. A reduction in viral loads was recorded when fish approached slaughter (18 mo in sea cages). Sequencing of positive samples did not support the hypothesis that outbreaks are caused by the spreading of a particular (virulent) strain of PRV.

References

Jul 22, 2004·Diseases of Aquatic Organisms·R T KongtorpA Lyngøy

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Citations

Apr 4, 2014·Veterinary Research·Oystein Wessel FinstadEspen Rimstad
Jan 9, 2016·Veterinary Research·Hanne Merethe HaatveitEspen Rimstad
Sep 9, 2015·Veterinary Research·Håvard BjørgenErling Olaf Koppang
Apr 19, 2015·Veterinary Research·Øystein WesselMaria Krudtaa Dahle
Jan 18, 2015·Virus Research·Øystein WesselEspen Rimstad
Nov 3, 2016·Journal of Fish Diseases·J Wiik-NielsenA B Mikalsen
Jun 13, 2018·Journal of Fish Diseases·Åse Helen Garseth, Eirik Biering
Nov 20, 2019·Journal of Fish Diseases·Beibei JiaIan A Gardner
Aug 18, 2017·Archives of Virology·Sunil Kumar MorSagar M Goyal
Jul 8, 2020·Journal of Fish Diseases·Øystein WesselEspen Rimstad
Sep 17, 2020·Journal of Fish Diseases·Mark P PolinskiKyle A Garver
Apr 4, 2019·Virology Journal·Molly J T KibengeFrederick S B Kibenge
Apr 2, 2019·Frontiers in Physiology·Yangfan ZhangKyle A Garver

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