Koi herpesvirus disease,
Information received on 02/07/2019 from Dr Martin Blake, Chief Veterinary Officer, Department of Agriculture, Food and the Marine, Agriculture House, Dublin, Ireland
Report type Immediate notification
Date of start of the event 31/05/2019
Date of confirmation of the event 07/06/2019
Report date 01/07/2019
Date submitted to OIE 02/07/2019
Date event resolved 15/06/2019
Reason for notification Recurrence of a listed disease
Date of previous occurrence 08/07/2016
Manifestation of disease Clinical disease
Causal agent Koi herpes virus
Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced), Necropsy
This event pertains to the whole country
Related reports Immediate notification (01/07/2019)
Follow-up report No. 1 (19/07/2019)
New outbreaks (1)
Outbreak 1 Near Mullingar, Westmeath
Date of start of the outbreak 31/05/2019
Outbreak status Resolved (15/06/2019)
Epidemiological unit Pond
Water type Fresh water
Population type Farmed
Production system Closed
Affected animals
Species Morbidity Mortality Susceptible Cases Deaths Killed and disposed of Slaughtered
Koi Carp (Cyprinus carpio) 60 % 56 % 32 18 18 14 0
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Koi Carp (Cyprinus carpio) 32 18 18 14 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Koi Carp (Cyprinus carpio) 56.25% 56.25% 100.00% 100.00%
*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
Epidemiological comments The pond has been cleaned and disinfected. The pond will be left dry for three months before restocking.
Control measures
Measures applied
  • Disinfection
  • Stamping out
  • Official disposal of carcasses, by-products and waste
  • 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
The Marine Institute (National laboratory) Koi Carp (Cyprinus carpio) real-time PCR 07/06/2019 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations