Infection with Gyrodactylus salaris,
Information received on 13/06/2017 from Dr Ingrid Eilertz, Chief Veterinary Officer Director and Head, Swedish Board of Agriculture Department for Animal Welfare and Health, Ministry for Rural Affairs, Jönköping, Sweden
Report type Immediate notification (Final report)
Date of start of the event 17/04/2017
Date of confirmation of the event 22/05/2017
Report date 13/06/2017
Date submitted to OIE 13/06/2017
Date event resolved 22/05/2017
Reason for notification Recurrence of a listed disease
Date of previous occurrence 23/10/2015
Manifestation of disease Sub-clinical infection
Causal agent Gyrodactylus salaris
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
New outbreaks (1)
Outbreak 1 Kungsbackaån, Kungsbacka, Kungsbacka, Hallands Län
Date of start of the outbreak 17/04/2017
Outbreak status Resolved (22/05/2017)
Epidemiological unit River system
Water type Fresh water
Population type Wild
Production system Open
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Salmon (Salmon salar) 0 % 0 % 1 1
Affected population Wild Atlantic salmons (Salmo salar) were collected and sampled within an on-going monitoring program.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Salmon (Salmon salar) 1 1
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Salmon (Salmon salar) ** ** ** **
*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 outside infected and/or protection zone
  • Surveillance within infected and/or protection zone
  • 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
Norwegian Veterinary Institute (OIE Reference Laboratory) Salmon (Salmon salar) nucleotide sequencing 22/05/2017 Positive
Norwegian Veterinary Institute (OIE Reference Laboratory) Salmon (Salmon salar) polymerase chain reaction (PCR) 22/05/2017 Positive
Future Reporting
The event is resolved. No more reports will be submitted.
Map of outbreak locations