Newcastle disease,
Botswana
Information received on 25/09/2019 from Dr Letlhogile Modisa, Director, Veterinary Services, Ministry of Agriculture, Gaborone, Botswana
Summary
Report type Follow-up report No. 5
Date of start of the event 15/09/2017
Date of confirmation of the event 28/11/2017
Report date 25/09/2019
Date submitted to OIE 25/09/2019
Date event resolved 15/01/2019
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
Related reports Immediate notification (01/12/2017)
Follow-up report No. 1 (19/03/2018)
Follow-up report No. 2 (20/04/2018)
Follow-up report No. 3 (25/07/2018)
Follow-up report No. 4 (17/12/2018)
Follow-up report No. 5 (25/09/2019)
Follow-up report No. 6 (02/10/2019)
New outbreaks (8)
Outbreak 1 Ramotswa, Ramotswa, South East, South_East
Date of start of the outbreak 26/10/2018
Outbreak status Resolved (30/12/2018)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 105 85 80 0 0
Affected population Backyard chicken
Outbreak 2 Charles Hill, Charles Hill, Ghanzi, Ghanzi
Date of start of the outbreak 16/11/2018
Outbreak status Resolved (30/12/2018)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 30 2 2 0 0
Affected population Backyard chicken
Outbreak 3 Kuke, Ghanzi, Ghanzi
Date of start of the outbreak 21/11/2018
Outbreak status Resolved (30/12/2018)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 21 16 15 0 0
Affected population Backyard chicken
Outbreak 4 Kgomokasitwa, Southern, Southern
Date of start of the outbreak 22/11/2018
Outbreak status Resolved (30/12/2018)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 20 6 4 0 0
Affected population Backyard chicken
Outbreak 5 Ramotswa, Ramotswa, South East, South_East
Date of start of the outbreak 26/11/2018
Outbreak status Resolved (30/12/2018)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 160 16 9 0 0
Affected population Backyard chicken
Outbreak 6 Ditshegwane, Letlhakane, Central, Central
Date of start of the outbreak 07/12/2018
Outbreak status Resolved (15/01/2019)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 49 30 20 0 0
Affected population Backyard chicken
Outbreak 7 Sefhophe, Selibi Phikwe, Central, Central
Date of start of the outbreak 07/12/2018
Outbreak status Resolved (30/12/2018)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 7 6 6 0 0
Affected population Backyard chicken
Outbreak 8 Multi 1845, Lobatse, South East, South_East
Date of start of the outbreak 11/12/2018
Outbreak status Resolved (15/01/2019)
Epidemiological unit Village
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 65 50 40 0 0
Affected population Backyard chicken
Summary of outbreaks Total outbreaks: 8
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Birds 457 211 176 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Birds 46.17% 38.51% 83.41% 38.51%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Contact with wild species
Epidemiological comments Birds reported dying or showing clinical signs. Laboratory results confirmed the birds were positive to Newcastle disease virus.
Control measures
Measures applied
  • Movement control inside the country
  • Surveillance outside containment and/or protection zone
  • Surveillance within containment and/or protection zone
  • Disinfection
  • Ante and post-mortem inspections
  • 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
Botswana National Veterinary Laboratory (National laboratory) Birds real-time PCR 09/11/2018 Positive
Botswana National Veterinary Laboratory (National laboratory) Birds real-time PCR 16/12/2018 Positive
Botswana National Veterinary Laboratory (National laboratory) Birds real-time PCR 16/12/2018 Positive
Botswana National Veterinary Laboratory (National laboratory) Birds real-time PCR 16/12/2018 Positive
Botswana National Veterinary Laboratory (National laboratory) Birds real-time PCR 16/12/2018 Positive
Botswana National Veterinary Laboratory (National laboratory) Birds real-time PCR 21/12/2018 Positive
Botswana National Veterinary Laboratory (National laboratory) Birds real-time PCR 21/12/2018 Positive
Botswana National Veterinary Laboratory (National laboratory) Birds real-time PCR 21/12/2018 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations