Infection with ostreid herpesvirus-1 microvariant,
Norway
Information received on 02/12/2014 from Dre Kristina Landsverk, Chief Veterinary Officer, Norwegian Food Safety Authority, Norwegian Food Safety Authority, Brumunddal, Norway
Summary
Report type Immediate notification (Final report)
Date of start of the event 31/10/2014
Date of confirmation of the event 31/10/2014
Report date 02/12/2014
Date submitted to OIE 02/12/2014
Date event resolved 02/12/2014
Reason for notification First occurrence of a listed disease
Manifestation of disease Clinical disease
Causal agent Ostreid herpesvirus 1
Nature of diagnosis Clinical, Laboratory (advanced)
This event pertains to the whole country
New outbreaks (1)
Outbreak 1 (2014/H1) 11111, Tønsberg, Vestfold , Vestfold
Date of start of the outbreak 31/10/2014
Outbreak status Resolved (02/12/2014)
Epidemiological unit Coastal area
Water type Salt water
Population type Wild
Production system Open
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Pacific oysters (Crassostrea gigas) 2 (scale 0 to 5) 3 (scale 0 to 5) 99 1 1 0 0
Affected population Wild Pacific oysters. Exact information on morbidity, mortality, susceptible, cases and deaths is not available.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Pacific oysters (Crassostrea gigas) 99 1 1 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Pacific oysters (Crassostrea gigas) 1.01% 1.01% 100.00% 1.01%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Horizontal spread through water
  • Contact with wild species
Control measures
Measures applied
  • Movement control inside the country
  • Traceability
  • 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
Institute of Marine Research (National laboratory) Pacific oysters (Crassostrea gigas) DNA microarray 31/10/2014 Positive
Institute of Marine Research (National laboratory) Pacific oysters (Crassostrea gigas) real-time PCR 31/10/2014 Positive
Future Reporting
The event is resolved. No more reports will be submitted.
Map of outbreak locations