Infectious haematopoietic necrosis,
Former Yug. Rep. of Macedonia
Information received on 30/12/2020 from Dr Zoran Atanasov, Director Food and Veterinary Agency, Food and Veterinary Agency, Food and Veterinary Agency , North Macedonia, SKOPJE, Former Yug. Rep. of Macedonia
Summary
Report type Follow-up report No. 3
Date of start of the event 01/09/2020
Date of confirmation of the event 16/09/2020
Report date 30/12/2020
Date submitted to OIE 30/12/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 13/03/2019
Manifestation of disease Clinical disease
Causal agent Infectious haematopoietic necrosis virus
Nature of diagnosis Clinical, Laboratory (basic), Necropsy
This event pertains to the whole country
Related reports Immediate notification (21/09/2020)
Follow-up report No. 1 (27/10/2020)
Follow-up report No. 2 (18/12/2020)
Follow-up report No. 3 (30/12/2020)
New outbreaks (12)
Outbreak 1 Izvor, Izvor, Drugovo, Kicevo
Date of start of the outbreak 15/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 1 (scale 0 to 5) 0 (scale 0 to 5) 75050 0 0 0
Outbreak 2 Gorni Dobrenoec, Gorni Dobrenoec, Kicevo, Kicevo
Date of start of the outbreak 15/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 1 (scale 0 to 5) 0 (scale 0 to 5) 50000 0 0 0
Outbreak 3 Makedonski Brod, Makedosnki Brod, Makedonski Brod, Brod
Date of start of the outbreak 22/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 1 (scale 0 to 5) 0 (scale 0 to 5) 44700 0 0 0
Outbreak 4 Laki, Vinica, Vinica, Vinica
Date of start of the outbreak 27/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Village
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 1 (scale 0 to 5) 0 (scale 0 to 5) 7100 5 0 0 0
Outbreak 5 Pehcevo, Pehcevo, Berovo, Berovo
Date of start of the outbreak 27/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 1 (scale 0 to 5) 0 (scale 0 to 5) 20000 5 0 0 0
Outbreak 6 Jegunovce, Jegunovce, Jegunovce, Tetovo
Date of start of the outbreak 17/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 1 (scale 0 to 5) 0 (scale 0 to 5) 3500 1 0 0 0
Outbreak 7 Volkovija, Volkovija, Brvenica, Tetovo
Date of start of the outbreak 17/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 1 (scale 0 to 5) 0 (scale 0 to 5) 6000 1 0 0 0
Outbreak 8 Dobroste, Dobroste, Tearce, Tetovo
Date of start of the outbreak 17/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 1 (scale 0 to 5) 0 (scale 0 to 5) 1000 1 0 0 0
Outbreak 9 Vrutok, Vrutok, Gostivar, Gostivar
Date of start of the outbreak 18/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 1 (scale 0 to 5) 0 (scale 0 to 5) 34300 7 0 0 0
Outbreak 10 Vrutok, Vrutok, Gostivar, Gostivar
Date of start of the outbreak 18/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 1 (scale 0 to 5) 0 (scale 0 to 5) 1000 2 0 0 0
Outbreak 11 Lukovo, Lukovo, Struga, Struga
Date of start of the outbreak 20/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 1 (scale 0 to 5) 0 (scale 0 to 5) 15300 30 0 0 0
Outbreak 12 Crnovec, Crnovec, Bitola, Bitola
Date of start of the outbreak 29/11/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Water type Fresh water
Population type Farmed
Production system Semi-closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 1 (scale 0 to 5) 0 (scale 0 to 5) 40000 4 0 0 0
Summary of outbreaks Total outbreaks: 12
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Rainbow trout (Oncorhynchus mykiss) (kg) 297950 56 ** 0 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Rainbow trout (Oncorhynchus mykiss) (kg) ** 0.00% ** 0.00%
*Removed from the susceptible population through death, destruction and/or slaughter
**Not calculated because of missing information
Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments Samples were taken from the pool in the frame of active monitoring activities.
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance outside infected and/or protection zone
  • Traceability
  • Official disposal of carcasses, by-products and waste
  • Zoning
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • Killing for commercial use or own use
  • Disinfection
Diagnostic test results
Laboratory name and type Species Test Test date Result
Faculty of Veterinary Medicine - Veterinary Institute (National laboratory) Trucha arcoíris (Oncorhynchus mykiss) real-time PCR 27/11/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations