Bovine spongiform encephalopathy,
Norway
Information received on 29/01/2015 from Dre Kristina Landsverk, Chief Veterinary Officer, Norwegian Food Safety Authority, Ministry of Agriculture and Food, Brumunddal, Norway
Summary
Report type Immediate notification
Date of start of the event 16/01/2015
Date of confirmation of the event 20/01/2015
Report date 29/01/2015
Date submitted to OIE 29/01/2015
Date event resolved 03/02/2015
Reason for notification First occurrence of a listed disease
Manifestation of disease Sub-clinical infection
Causal agent Prion (atypical BSE type H)
Nature of diagnosis Laboratory (advanced)
This event pertains to the whole country
Related reports Immediate notification (29/01/2015)
Follow-up report No. 1 (06/02/2015)
Follow-up report No. 2 (20/02/2015)
New outbreaks (1)
Outbreak 1 Verran, Tua, District office Innherred og Fosen, Region office Trøndelag og Møre og Romdal, NORD-TRONDELAG
Date of start of the outbreak 16/01/2015
Outbreak status Resolved (03/02/2015)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 27 1 0 1 0
Affected population The farm is a beef cattle farm with a herd of Scottish Highland cattle.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 27 1 0 1 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Cattle 3.70% 0.00% 0.00% 3.70%
*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 Based on status on 29 January 2015: On 20 January 2015, the Norwegian Veterinary Institute reported suspicion of BSE on a cow in Norway, based on initial test done on CNS material. Part of this material was sent to European Union Reference Laboratory in Weybridge (21 January 2015) for verification of diagnosis. The affected cow was a 15-year-old and born in Norway. The dam was imported from Sweden. The cow did not show clinical signs of neurological disease before she was killed (12 January 2015) due to old age and injuries. The BSE test was taken as part of the BSE surveillance program. The Norwegian Food Safety Authority (NFSA) has put restrictions on movement on the farm, and performed epidemiological investigations. The NFSA has identified four risk animals, according to relevant legislation. These animals are also placed under official movement restrictions. The four identified risk animals will be killed and disposed by incineration according to European Union legislation. The epidemiological investigation including tracing of risk animals from the holding of origin as well as the present holding has identified 2 offspring borne within two years prior to the incident in addition to 2 cattle belonging either to (1) the cohort of animals born in the same herd as the affected animal within 12 months preceding or following the date of birth of the affected cow or (2) the cohort of animals which at any time during the first year of their lives were reared together with the affected cow during her first year of life. Progeny borne within two years prior to the incident and the cohort of risk animals are put under movement restrictions and the killing and destruction of these animals will be carried into effect as soon as possible. The affected cow’s carcass has been completely destroyed. The NFSA ensures that the cow’s carcass has been processed by pressure sterilisation in a Category 1 processing plant and that the resulting material has been sent for incineration/co-incineration in accordance with the By-Products Regulation.
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Modified stamping out
Diagnostic test results
Laboratory name and type Species Test Test date Result
Norwegian Veterinary Institute (National laboratory) Cattle enzyme-linked immunosorbent assay (ELISA) 20/01/2015 Positive
Norwegian Veterinary Institute (National laboratory) Cattle western blot 20/01/2015 Positive
EU Reference Laboratory, Animal and Plant Health Agency (APHA), Weybridge (United Kingdom) (OIE Reference Laboratory) Cattle immunohistochemical test 28/01/2015 Positive
EU Reference Laboratory, Animal and Plant Health Agency (APHA), Weybridge (United Kingdom) (OIE Reference Laboratory) Cattle western blot 28/01/2015 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations