A novel totivirus and piscine reovirus (PRV) in Atlantic salmon (Salmo salar) with cardiomyopathy syndrome (CMS)
Name
Lovoll-2010-A novel totivirus and piscine.pdf
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Author(s)
Lovoll, Marie
Wiik-Nielsen, Jannicke
Grove, Soren
Wiik-Nielsen, Christer R.
Kristoffersen, Anja B.
Faller, Randi
Poppe, Trygve
Jung, Joonil
Pedamallu, Chandra S.
Nederbragt, Alexander J.
Date Issued
November 2010
Journal
Virology Journal
Publisher
BioMed Central Ltd.
Citation
Løvoll, Marie et al. “A Novel Totivirus and Piscine Reovirus (PRV) in Atlantic Salmon (Salmo Salar) with Cardiomyopathy Syndrome (CMS).” Virology Journal 7.1 (2010): 309. Web.
Version
Final published version
Abstract
Background
Cardiomyopathy syndrome (CMS) is a severe disease affecting large farmed Atlantic salmon. Mortality often appears without prior clinical signs, typically shortly prior to slaughter. We recently reported the finding and the complete genomic sequence of a novel piscine reovirus (PRV), which is associated with another cardiac disease in Atlantic salmon; heart and skeletal muscle inflammation (HSMI). In the present work we have studied whether PRV or other infectious agents may be involved in the etiology of CMS.
Results
Using high throughput sequencing on heart samples from natural outbreaks of CMS and from fish experimentally challenged with material from fish diagnosed with CMS a high number of sequence reads identical to the PRV genome were identified. In addition, a sequence contig from a novel totivirus could also be constructed. Using RT-qPCR, levels of PRV in tissue samples were quantified and the totivirus was detected in all samples tested from CMS fish but not in controls. In situ hybridization supported this pattern indicating a possible association between CMS and the novel piscine totivirus.
Conclusions
Although causality for CMS in Atlantic salmon could not be proven for either of the two viruses, our results are compatible with a hypothesis where, in the experimental challenge studied, PRV behaves as an opportunist whereas the totivirus might be more directly linked with the development of CMS.
MIT Department
Harvard University--MIT Division of Health Sciences and Technology
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DOI of Published Version
https://doi.org/10.1186/1743-422x-7-309
