Journal
JOURNAL OF FISH DISEASES
Volume 40, Issue 11, Pages 1625-1634Publisher
WILEY
DOI: 10.1111/jfd.12630
Keywords
cleaner fish; lumpfish (Cyclopterus lumpus L.); Piscirickettsia salmonis
Funding
- Fish Vet Group Ireland
- Marine Institute
- Bord Iascaigh Mhara (Irish Sea Fisheries Board)
- Marine Harvest Ireland
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A Piscirickettsia salmonis infection was diagnosed in lumpfish (Cyclopterus lumpus L.) juveniles held in a marine research facility on the west coast of Ireland. The main clinical signs and pathology included marked ascites, severe multifocal liver necrosis and severe diffuse inflammation and necrosis of the exocrine pancreas and peri-pancreatic adipose tissue. Numerous Piscirickettsia-like organisms were observed by histopathology in the affected organs, and the bacterial species was characterized by molecular analysis. Sequencing of the partial 16 S rDNA gene and internal transcribed spacer region showed the lumpfish sequences to be closely related to previously identified Atlantic salmon (Salmo salar L.) sequences from Ireland. To the authors' knowledge, this is the first detection of P.salmonis in lumpfish worldwide. The infection is considered potentially significant in terms of lumpfish health and biosecurity.
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