Brucellosis (Brucella melitensis),
Sierra Leone
Information received on 11/08/2020 from Dr Amadu Tejan Jalloh, Deputy Director - Animal Health, Livestock and Veterinary Services Division, Ministry of Agriculture and Forestry , Freetown, Sierra Leone
Summary
Report type Immediate notification
Date of start of the event 16/07/2020
Date of confirmation of the event 20/07/2020
Report date 11/08/2020
Date submitted to OIE 11/08/2020
Reason for notification Recurrence of a listed disease
Date of previous occurrence 2011
Manifestation of disease Clinical disease
Causal agent Brucella melitensis
Nature of diagnosis Laboratory (advanced)
This event pertains to a defined zone within the country
New outbreaks (4)
Outbreak 1 Kafogo, Kasunku, Koinadugu, Koinadugu
Date of start of the outbreak 16/07/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Goats 1
Outbreak 2 Billimia newsite, Sengbeh, Koinadugu, Koinadugu
Date of start of the outbreak 16/07/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Sheep 3
Outbreak 3 Kamasokola, Wara Wara Yagala, Koinadugu, Koinadugu
Date of start of the outbreak 16/07/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Goats 2
Outbreak 4 Funumba Kura, Kalian, Koinadugu, Koinadugu
Date of start of the outbreak 16/07/2020
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Goats 2
Summary of outbreaks Total outbreaks: 4
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Goats 5
Sheep 3
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Goats ** ** ** **
Sheep ** ** ** **
*Removed from the susceptible population through death, destruction and/or slaughter
**Not calculated because of missing information
Epidemiology
Source of the outbreak(s) or origin of infection
  • Introduction of new live animals
  • Legal movement of animals
  • Illegal movement of animals
  • Contact with infected animal(s) at grazing/watering
  • Fomites (humans, vehicles, feed, etc.)
Epidemiological comments According to the livestock statistics, 101,806 goats and 142,940 sheep are at risk of developing the disease in the district of Koinadugu.
Control measures
Measures applied
  • Surveillance within containment and/or protection zone
  • Quarantine
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Movement control inside the country
  • Screening
Diagnostic test results
Laboratory name and type Species Test Test date Result
Central Veterinary Laboratory Teko (National laboratory) Goats rose bengal test (RBT) 20/07/2020 Positive
Central Veterinary Laboratory Teko (National laboratory) Sheep rose bengal test (RBT) 20/07/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations