Rift Valley fever,
Senegal
Information received on 28/10/2020 from Dr Mbargou Lo, Directeur des Services vétérinaires, Direction des Services vétérinaires, Ministère de l'Elevage et des Productions animales, Dakar, Senegal
Summary
Report type Follow-up report No. 1
Date of start of the event 03/09/2020
Date of confirmation of the event 14/09/2020
Report date 28/10/2020
Date submitted to OIE 28/10/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 15/05/2014
Manifestation of disease Clinical disease
Causal agent Rift Valley Fever virus
Nature of diagnosis Clinical, Laboratory (basic), Laboratory (advanced), Necropsy
This event pertains to a defined zone within the country
Related reports Immediate notification (15/10/2020)
Follow-up report No. 1 (28/10/2020)
New outbreaks (1)
Outbreak 1 Ndiébène Gandiole, Saint-Louis, Saint-Louis, Saint Louis
Date of start of the outbreak 05/10/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Dorcas gazelle:Gazella dorcas(Bovidae) 36 2 1 0 0
Affected population The affected Dorcas gazelle showed haemorrhagic viscera, hepatitis and pneumonia. In addition, an aborted fetus had been sent to the National Laboratory for Veterinary Research and Livestock.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Dorcas gazelle:Gazella dorcas(Bovidae) 36 2 1 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Dorcas gazelle:Gazella dorcas(Bovidae) 5.56% 2.78% 50.00% 2.78%
*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
  • Vectors
Epidemiological comments Wandering of goats was observed in the reserve of Gueumbeul which shelters antelopes.
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance outside containment and/or protection zone
  • Surveillance within containment and/or protection zone
  • Quarantine
  • Control of wildlife reservoirs
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Vaccination in response to the outbreak (s)
  • Traceability
  • Disinfection
  • Disinfestation
  • Control of vectors
  • Vector surveillance
  • Ante and post-mortem inspections
Diagnostic test results
Laboratory name and type Species Test Test date Result
National Laboratory for Veterinary Research and Livestock (National laboratory) Dorcas gazelle polymerase chain reaction (PCR) 12/10/2020 Positive
National Laboratory for Veterinary Research and Livestock (National laboratory) Roan antelope polymerase chain reaction (PCR) 14/09/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations