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Evolution of the fish rhabdovirus: viral hemorrhagic septicemia

Viral haemorrhagic septicaemia (VHS) caused by the rhabdovirus VHSV   is economically the most important viral disease in European rainbow   trout farming. Until 1989, this virus was mainly isolated from   freshwater salmonids but in the last decade, it has also been   isolated from an increasing number of free-living marine fish   species. To study the genetic evolution of VHSV, the entire G gene   from 74 isolates was analysed. VHSV from wild marine species caught   in the Baltic Sea, Skagerrak, Kattegat, North Sea, and English   Channel and European freshwater isolates, appeared to share a recent   common ancestor. Based on the estimated nucleotide substitution   rate, the ancestor of the European fresh water isolates was dated   some 5  years ago. This finding fits with the initial reports in the   195 s on clinical observations of VHS in Danish freshwater rainbow   trout farms. The study also indicates that European marine VHSV and   the North American marine line separated approx. 5   years ago. The   codon substitution rate among the freshwater VHSV isolates was found   to be 2·5 times faster than among marine isolates. The data support   the hypothesis of the marine environment being the original   reservoir of VHSV and that the change in host range (to include   rainbow trout) may have occurred several times. Virus from the   marine environment will therefore continue to represent a threat to   the trout aquaculture industry.    (VHS); (VHSv); (viral hemorrhagic septicemia); (viral haemorrhagic   septicaemia); (viral hemmorrhagic septicemia)

In progress
Start Date
End Date
Scope of Study
Field Investigation
Laboratory Investigation
Impact of Pollutants
Exotic Species
Resource Management
Resource Being Monitored
Beneficial Use Impairment Assessments
Fish Tumours or Other Deformities
Loss of Fish and Wildlife Habitat
Tainting of Fish and Wildlife Populations
Biology And Life History
Parasites and Diseases
Annex Numbers
Research & Development
Annex 17
Impact of water quality and AIS on fish and wildlife populations and habitats
  • Annex Numbers
    Annex Numbers
    Research & Development
  • Annex 17
    Annex 17
    Impact of water quality and AIS on fish and wildlife populations and habitats

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