Koi herpesvirus disease,
South Africa
Information received on 20/07/2020 from Dr Bothle Michael Modisane, Chief Director , Department of Agriculture, Forestry and Fisheries, Animal Production and Health, PRETORIA, South Africa
Report type Immediate notification
Date of start of the event 10/11/2019
Date of confirmation of the event 28/11/2019
Report date 20/07/2020
Date submitted to OIE 20/07/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 03/11/2019
Manifestation of disease Clinical disease
Causal agent Koi herpes virus
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
New outbreaks (1)
Outbreak 1 (KHV_GAU2_2019_01) KHV_GAU2_2019_01, City of Tshwane, Gauteng
Date of start of the outbreak 10/11/2019
Outbreak status Continuing (or date resolved not provided)
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 (Cyprinus carpio) 11.6 % 10 % 600 70 60 540 0
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Koi (Cyprinus carpio) 600 70 60 540 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Koi (Cyprinus carpio) 11.67% 10.00% 85.71% 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
Control measures
Measures applied
  • Quarantine
  • Stamping out
  • Disinfection
  • Vaccination prohibited
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Molecular Diagnostic Services (Private Laboratory) Koi (Cyprinus carpio) polymerase chain reaction (PCR) 28/11/2019 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations