Crayfish plague (Aphanomyces astaci),
Information received on 21/10/2013 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 18/10/2013
Date of confirmation of the event 18/10/2013
Report date 21/10/2013
Date submitted to OIE 21/10/2013
Date event resolved 10/02/2015
Reason for notification First occurrence of a listed disease
Manifestation of disease Clinical disease
Causal agent Aphanomyces astaci
Nature of diagnosis Laboratory (advanced), Necropsy
This event pertains to a defined zone within the country
Related reports Immediate notification (21/10/2013)
Follow-up report No. 1 (25/03/2014)
Follow-up report No. 2 (10/02/2015)
New outbreaks (1)
Outbreak 1 (2013/8) 11111, Kvesjøen, Lierne, Namdal, Nord-Trondelag
Date of start of the outbreak 18/10/2013
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Lake
Water type Fresh water
Population type Wild
Production system Open
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Signal crayfish (Pacifastacus leniusculus) 0.1 % 0.1 % 99 1 1 0 0
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Signal crayfish (Pacifastacus leniusculus) 99 1 1 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Signal crayfish (Pacifastacus leniusculus) 1.01% 1.01% 100.00% 1.01%
*Removed from the susceptible population through death, destruction and/or slaughter
Source of the outbreak(s) or origin of infection
  • Introduction of new live animals
  • Illegal movement of animals
Control measures
Measures applied
  • Movement control inside the country
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Traceability
  • Traceability
  • Surveillance outside containment and/or protection zone
  • Surveillance within containment and/or protection zone
  • Zoning
Diagnostic test results
Laboratory name and type Species Test Test date Result
Norwegian Veterinary Institute (National laboratory) Signal Crayfish (Pacifastacus leniusculus) real-time PCR 18/10/2013 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations