Rift Valley fever,
Kenya
Information received on 28/02/2019 from Dr Obadiah Nyaga Njagi, Director of Veterinary Services, Directorate of Veterinary Services, State Department of Livestock, Ministry of Agriculture, Livestock and Fisheries, NAIROBI, Kenya
Summary
Report type Immediate notification
Date of start of the event 25/01/2019
Date of confirmation of the event 27/02/2019
Report date 28/02/2019
Date submitted to OIE 28/02/2019
Date event resolved 21/03/2019
Reason for notification Recurrence of a listed disease
Date of previous occurrence 30/07/2018
Manifestation of disease Clinical disease
Causal agent Rift valley fever virus
Nature of diagnosis Laboratory (basic)
This event pertains to a defined zone within the country
Related reports Immediate notification (28/02/2019)
Follow-up report No. 1 (22/03/2019)
New outbreaks (2)
Outbreak 1 Kihingo, Murang'A
Date of start of the outbreak 25/01/2019
Outbreak status Resolved (21/03/2019)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 160 4 0 0 0
Outbreak 2 Shamata, Nyandarua
Date of start of the outbreak 25/02/2019
Outbreak status Resolved (21/03/2019)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 70 4 0 0 0
Sheep 140 1 0 0 0
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 230 8 0 0 0
Sheep 140 1 0 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Cattle 3.48% 0.00% 0.00% 0.00%
Sheep 0.71% 0.00% 0.00% 0.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Contact with infected animal(s) at grazing/watering
  • Vectors
Epidemiological comments Cattle was the primary species affected. This can be attributed to a high ratio of cattle relative to other species. Abortions were recorded in all stages of gestation.
Control measures
Measures applied
  • Movement control inside the country
  • Vaccination in response to the outbreak (s)
  • Quarantine
  • Disinfection
  • Ante and post-mortem inspections
  • No treatment of affected animals
Measures to be applied
  • Vector surveillance
Diagnostic test results
Laboratory name and type Species Test Test date Result
Central veterinary laboratory, Kabete (National laboratory) Cattle IgM-capture ELISA 27/02/2019 Positive
Central veterinary laboratory, Kabete (National laboratory) Sheep IgM-capture ELISA 27/02/2019 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations