Infectious salmon anaemia,
Norway
Information received on 07/07/2014 from Dre Kristina Landsverk, Chief Veterinary Officer, Norwegian Food Safety Authority, Ministry of Agriculture and Food, Brumunddal, Norway
Summary
Report type Follow-up report No. 5
Date of start of the event 26/06/2013
Date of confirmation of the event 26/06/2013
Report date 07/07/2014
Date submitted to OIE 07/07/2014
Date event resolved 09/03/2015
Reason for notification First occurrence of a listed disease
Manifestation of disease Clinical disease
Causal agent Infectious salmon anaemia virus
Nature of diagnosis Clinical, Laboratory (advanced), Necropsy
This event pertains to a defined zone within the country
Related reports Immediate notification (27/06/2013)
Follow-up report No. 1 (01/07/2013)
Follow-up report No. 2 (28/02/2014)
Follow-up report No. 3 (09/05/2014)
Follow-up report No. 4 (28/05/2014)
Follow-up report No. 5 (07/07/2014)
Follow-up report No. 6 (10/07/2014)
Follow-up report No. 7 (09/10/2014)
Follow-up report No. 8 (10/02/2015)
Follow-up report No. 9 (26/06/2015)
New outbreaks (1)
Outbreak 1 (2014/6) 11238 Lang°yhovden, ěksnes, Vesterňlen, NORDLAND
Date of start of the outbreak 01/07/2014
Outbreak status Resolved (31/12/2014)
Epidemiological unit Farm
Water type Salt water
Population type Farmed
Production system Semi-open
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Atlantic salmon (Salmo salar) 3 (scale 0 to 5) 3 (scale 0 to 5) 661661 49808 47808 94548 519305
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Atlantic salmon (Salmo salar) 661661 49808 47808 94548 519305
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Atlantic salmon (Salmo salar) 7.53% 7.23% 95.98% 100.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments From an epidemiological point of view, the Norwegian Food Safety Authority considers the ISA outbreak at 11238 Lang°yhovden to be a reoccurrence since ISA was present at another location in the same area one year ago. The neighbour farm with the previous ISA case, 11248 Bonhammaren, is located 10 kilometers away from Lang°yhovden. The two sea sites are operated by different companies. The virus relating to the recent ISA outbreak will be further characterized in relation with the epidemiologic studies.
Control measures
Measures applied
  • Movement control inside the country
  • Disinfection / Disinfestation
  • Emergency harvest
  • Traceability
  • Surveillance outside containment and/or protection zone
  • Modified stamping out
  • Surveillance within containment and/or protection zone
  • Zoning
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Norwegian Veterinary Institute (Regional Reference Laboratory) Atlantic Salmon (Salmo salar) histopathological examination 01/07/2014 Pending
Norwegian Veterinary Institute (Regional Reference Laboratory) Atlantic Salmon (Salmo salar) immunohistochemical test 01/07/2014 Positive
Norwegian Veterinary Institute (Regional Reference Laboratory) Atlantic Salmon (Salmo salar) real-time PCR 01/07/2014 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations