Tilapia lake virus,
Colombia
Information received on 04/06/2020 from Dra. Deyanira Barrero León, Gerente General, Instituto Colombiano Agropecuario (ICA), Ministerio de Agricultura y Desarrollo Rural, BOGOTA, Colombia
Summary
Report type Immediate notification
Date of start of the event 02/04/2020
Date of confirmation of the event 08/04/2020
Report date 04/06/2020
Date submitted to OIE 04/06/2020
Reason for notification Emerging disease
Morbidity 50 %
Mortality 46.2 %
Zoonotic impact No
Causal agent Tilapia lake virus
Serotype Not typed
New outbreaks (1)
Outbreak 1 (220262) Villa Francisco, La Cascada, Palmira, Valle
Date of start of the outbreak 02/04/2020
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
Tilapia (Orechromis sp) 50 % 46.2 % 2600 1300 1200 0 0
Affected population The affected population corresponds to fry located in a polyculture farm (Tilapia and Cachama). Mortality also occurred in Cachama, due to poor management conditions and biosecurity failures.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Tilapia (Orechromis sp) 2600 1300 1200 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Tilapia (Orechromis sp) 50.00% 46.15% 92.31% 46.15%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Introduction of new live animals
  • Horizontal spread through water
Epidemiological comments The aquaculture farm is a subsistence one and is dedicated to fattening for self-consumption and local consumption. It does not have the minimum biosecurity measures for the breeding of these animals. The water comes from a nearby river, which receives black and grey water discharges from dwellings and pig holdings in the area. No treatment is carried out on the water used. Wild birds and and companion animals have also free access to the production area.
Control measures
Measures applied
  • Surveillance outside infected and/or protection zone
  • Surveillance within infected and/or protection zone
  • Traceability
  • Surveillance outside containment and/or protection zone
  • Disinfection
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Disinfection / Disinfestation
  • Screening
Diagnostic test results
Laboratory name and type Species Test Test date Result
National veterinary diagnostic laboratory (National laboratory) Tilapia (Orechromis sp) polymerase chain reaction (PCR) 08/04/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations