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
Date event resolved 30/11/2019
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
Related reports Immediate notification (20/07/2020)
Follow-up report No. 1 (20/10/2020)
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 Resolved (30/11/2019)
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 (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