Information received on 31/01/2020 from Mr Knut Rønningen, Director, Norwegian Food Safety Authority, Ministry of Agriculture and Food, Brumunddal, Norway
Report type Follow-up report No. 5
Date of start of the event 20/06/2019
Date of confirmation of the event 10/07/2019
Report date 31/01/2020
Date submitted to OIE 31/01/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 2009
Manifestation of disease Sub-clinical infection
Causal agent Maedi-visna virus
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (11/07/2019)
Follow-up report No. 1 (06/09/2019)
Follow-up report No. 2 (30/10/2019)
Follow-up report No. 3 (29/11/2019)
Follow-up report No. 4 (31/12/2019)
Follow-up report No. 5 (31/01/2020)
Follow-up report No. 6 (29/02/2020)
Follow-up report No. 7 (08/04/2020)
New outbreaks (1)
Outbreak 1 Mosvik, Inderøy, Innherred and Fosen Departement, Central Region, Nord-Trondelag
Date of start of the outbreak 13/01/2020
Outbreak status Resolved (10/03/2020)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Sheep 76 44 74
Affected population Contact farm.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Sheep 76 44 74
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Sheep 57.89% ** ** **
*Removed from the susceptible population through death, destruction and/or slaughter
**Not calculated because of missing information
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance within containment and/or protection zone
  • Traceability
  • Quarantine
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Selective killing and disposal
  • Slaughter
  • Ante and post-mortem inspections
Diagnostic test results
Laboratory name and type Species Test Test date Result
Norwegian Veterinary Institute (National laboratory) Sheep antibody detection ELISA 13/01/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations