Information received on 11/07/2019 from Dre Kristina Landsverk, Chief Veterinary Officer, Norwegian Food Safety Authority, Norwegian Food Safety Authority, Brumunddal, Norway
Report type Immediate notification
Date of start of the event 20/06/2019
Date of confirmation of the event 10/07/2019
Report date 11/07/2019
Date submitted to OIE 11/07/2019
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)
New outbreaks (1)
Outbreak 1 Steinkjer, Innherred and Fosen Departement , Central Region, Nord-Trondelag
Date of start of the outbreak 20/06/2019
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Sheep 220 4 2
Affected population Primary farm for infected animals
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Sheep 220 4 2
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Sheep 1.82% ** ** **
*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
  • Surveillance within containment and/or protection zone
  • Quarantine
  • Selective killing and disposal
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Traceability
Diagnostic test results
Laboratory name and type Species Test Test date Result
Norwegian Veterinary Institute (National laboratory) Sheep polymerase chain reaction (PCR) 10/07/2019 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations