Brucellosis (Brucella abortus),
Information received on 05/06/2019 from Dr Letlhogile Modisa, Director, Veterinary Services, Ministry of Agriculture, Gaborone, Botswana
Report type Immediate notification
Date of start of the event 09/04/2019
Date of confirmation of the event 05/06/2019
Report date 05/06/2019
Date submitted to OIE 05/06/2019
Reason for notification Recurrence of a listed disease
Date of previous occurrence 23/10/2018
Manifestation of disease Clinical disease
Causal agent Brucella abortus
Nature of diagnosis Clinical, Laboratory (advanced)
This event pertains to a defined zone within the country
New outbreaks (1)
Outbreak 1 Sunnyside, Lobatse, South East, South_East
Date of start of the outbreak 09/04/2019
Outbreak status Resolved (20/04/2019)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 905 5 0 0 0
Affected population Dairy farm.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Cattle 905 5 0 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Cattle 0.55% 0.00% 0.00% 0.00%
*Removed from the susceptible population through death, destruction and/or slaughter
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
  • Legal movement of animals
Epidemiological comments Dairy cow tested positive to the milk ring test initially and was submitted to rose bengal plate test (RBPT) and complement fixation test (CFT) returning positive antibody results. While investigations were on-going four other animals aborted and Brucella species was isolated in culture from foetal material.
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance within containment and/or protection zone
  • Traceability
  • Quarantine
  • Official destruction of animal products
  • Official disposal of carcasses, by-products and waste
  • Ante and post-mortem inspections
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Surveillance outside containment and/or protection zone
  • Selective killing and disposal
Diagnostic test results
Laboratory name and type Species Test Test date Result
Botswana National Veterinary Laboratory (National laboratory) Cattle pathogen isolation on cell culture 05/06/2019 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations