African swine fever,
Kenya
Information received on 04/03/2011 from Dr Peter Maina Ithondeka, Director of Veterinary Services , Department of Veterinary Services , Ministry of Livestock Development , Nairobi, Kenya
Summary
Report type Immediate notification
Date of start of the event 07/12/2010
Date of confirmation of the event 12/01/2011
Report date 04/03/2011
Date submitted to OIE 04/03/2011
Date event resolved 02/04/2012
Reason for notification Recurrence of a listed disease
Date of previous occurrence 18/11/2007
Manifestation of disease Clinical disease
Causal agent African swine fever virus
Nature of diagnosis Laboratory (advanced)
This event pertains to the whole country
Related reports Immediate notification (04/03/2011)
Follow-up report No. 1 (28/11/2011)
Follow-up report No. 2 (02/11/2012)
New outbreaks (2)
Outbreak 1 KISUMU EAST, KISUMU EAST, KISUMU EAST, Nyanza
Date of start of the outbreak 07/12/2010
Outbreak status Resolved (02/04/2012)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Swine 206 130 130 0 0
Affected population Several farms (28) rearing pigs experienced deaths of pigs. The farms are outside Kisumu town, where subsistence farmers keep between two to 14 pigs each.
Outbreak 2 MAHIAKALO, MUNICIPALITY, KAKAMEGA CENTRAL, Western
Date of start of the outbreak 23/12/2010
Outbreak status Resolved (06/03/2012)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Swine 150 70 35 0 60
Affected population Subsistence farms around town were affected. 3 farms that use swill were affected.
Summary of outbreaks Total outbreaks: 2
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Swine 356 200 165 0 60
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Swine 56.18% 46.35% 82.50% 63.20%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
  • Illegal movement of animals
  • Swill feeding
  • Fomites (humans, vehicles, feed, etc.)
Epidemiological comments Farms affected are those of subsistence farmers around built-up areas and feeding swill.
Control measures
Measures applied
  • Movement control inside the country
  • Screening
  • Disinfection / Disinfestation
  • Quarantine
  • Zoning
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Kabete Central Veterinary Laboratory (National laboratory) Swine antigen (Ag) detection ELISA 14/01/2011 Positive
Animal Health Research Centre (CISA-INIA), Spain (OIE Reference Laboratory) Swine antibody detection ELISA 12/01/2011 Positive
Animal Health Research Centre (CISA-INIA), Spain (OIE Reference Laboratory) Swine polymerase chain reaction (PCR) 12/01/2011 Positive
Animal Health Research Centre (CISA-INIA), Spain (OIE Reference Laboratory) Swine virus isolation 12/01/2011 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations