Newcastle disease,
Botswana
Information received on 01/12/2017 from Dr Letlhogile Modisa, Director, Veterinary Services, Ministry of Agriculture, Gaborone, Botswana
Summary
Report type Immediate notification
Date of start of the event 15/09/2017
Date of confirmation of the event 28/11/2017
Report date 01/12/2017
Date submitted to OIE 01/12/2017
Reason for notification Recurrence of a listed disease
Date of previous occurrence 12/2016
Manifestation of disease Clinical disease
Causal agent Newcastle disease virus
Nature of diagnosis Clinical, Laboratory (advanced)
This event pertains to a defined zone within the country
New outbreaks (3)
Outbreak 1 Oodi, Oodi, Kgatleng, KGATLENG
Date of start of the outbreak 15/09/2017
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 140 23 17 0 0
Outbreak 2 Shapane, Serowe, Central, CENTRAL
Date of start of the outbreak 22/09/2017
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Backyard
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 59 48 41 0 0
Outbreak 3 Tlokweng, Tlokweng, South East, SOUTH_EAST
Date of start of the outbreak 23/10/2017
Outbreak status Continuing (or date resolved not provided)
Epidemiological unit Other
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 50 15 15 0 0
Affected population domesticated pigeons
Summary of outbreaks Total outbreaks: 3
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 249 86 73 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 34.54% 29.32% 84.88% 29.32%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
  • Contact with wild species
Epidemiological comments Backyard chickens were reported sick showing signs like dullness, diarrhoea, nervous signs and deaths, mostly within 24-36hrs. Some wild doves and pigeons also showed similar signs and some were found dead. The event is continuing.
Control measures
Measures applied
  • Movement control inside the country
  • Vaccination in response to the outbreak (s)
    Administrative division Species Total Vaccinated Details
    CENTRAL Birds 25
  • Surveillance outside containment and/or protection zone
  • Surveillance within containment and/or protection zone
  • Traceability
  • Disinfection
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
Botswana Veterinary Laboratory (National laboratory) Birds real-time PCR 28/11/2017 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations