Rift Valley fever,
Kenya
Information received on 02/07/2018 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 Follow-up report No. 3
Date of start of the event 03/06/2018
Date of confirmation of the event 14/06/2018
Report date 02/07/2018
Date submitted to OIE 02/07/2018
Date event resolved 30/07/2018
Reason for notification Recurrence of a listed disease
Date of previous occurrence 18/11/2007
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 (08/06/2018)
Follow-up report No. 1 (15/06/2018)
Follow-up report No. 2 (22/06/2018)
Follow-up report No. 3 (02/07/2018)
Follow-up report No. 4 (16/07/2018)
Follow-up report No. 5 (06/08/2018)
Follow-up report No. 6 (15/08/2018)
Follow-up report No. 7 (28/08/2018)
Follow-up report No. 8 (21/09/2018)
Follow-up report No. 9 (08/11/2018)
New outbreaks (3)
Outbreak 1 Saleti, Merti, Merti, Isiolo
Date of start of the outbreak 15/06/2018
Outbreak status Resolved (30/07/2018)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Goats 200 12 0 0 0
Sheep 240 3 0 0 0
Affected population The affected population is in a pastoral system of production which presented with abortions. the cases are reported in an area with increased mosquito population after the heavy rains and flooding
Outbreak 2 Garbatulla, Isiolo
Date of start of the outbreak 19/06/2018
Outbreak status Resolved (30/07/2018)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Goats 190 12 0 0 0
Outbreak 3 Siaya, Siaya
Date of start of the outbreak 21/06/2018
Outbreak status Resolved (30/07/2018)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 150 6 0 0 0
Goats 200 21 0 0 0
Sheep 90 11 0 0 0
Summary of outbreaks Total outbreaks: 3
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Goats 590 45 0 0 0
Sheep 330 14 0 0 0
Cattle 150 6 0 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Goats 7.63% 0.00% 0.00% 0.00%
Sheep 4.24% 0.00% 0.00% 0.00%
Cattle 4.00% 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
  • Illegal movement of animals
  • Contact with infected animal(s) at grazing/watering
  • Vectors
Control measures
Measures applied
  • Ante and post-mortem inspections
  • Vector surveillance
  • Quarantine
  • Surveillance within containment and/or protection zone
  • Vaccination in response to the outbreak (s)
  • Movement control inside the country
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Central veterinary laboratory (National laboratory) Goats enzyme-linked immunosorbent assay (ELISA) 29/06/2018 Positive
Central veterinary laboratory (National laboratory) Sheep enzyme-linked immunosorbent assay (ELISA) 29/06/2018 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations