African horse sickness,
Swaziland
Information received on 16/04/2019 from Dr Roland Xolani Dlamini, Director of Veterinary and Livestock Services, Veterinary and Livestock Services, Ministry of Agriculture , Mbabane, Swaziland
Summary
Report type Immediate notification
Date of start of the event 08/03/2019
Date of confirmation of the event 03/04/2019
Report date 15/04/2019
Date submitted to OIE 16/04/2019
Date event resolved 29/07/2019
Reason for notification Recurrence of a listed disease
Date of previous occurrence 22/05/2018
Manifestation of disease Clinical disease
Causal agent African horse sickness virus
Serotype Not typed
Nature of diagnosis Laboratory (basic)
This event pertains to the whole country
Related reports Immediate notification (15/04/2019)
Follow-up report No. 1 (30/04/2019)
Follow-up report No. 2 (29/07/2019)
New outbreaks (4)
Outbreak 1 Scotts Ranch, Manzini
Date of start of the outbreak 08/03/2019
Outbreak status Resolved (29/07/2019)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 9 2 0 0 0
Affected population A stable with mixed breeds ranging from 6 to 11 years of age. Fly repellent is used on the horses daily. Horses were last vaccinated for AHS in October 2018.
Outbreak 2 Nelson, Hhohho
Date of start of the outbreak 15/03/2019
Outbreak status Resolved (29/07/2019)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 36 1 0 0 0
Affected population Population of different breeds of horses and one donkey. The horses are of different ages and sexes. They are free range but stabled between 1500 hours and 0930 hours in the morning. The stables are sprayed every night with an insect repellent and there are mosquito nets. There is a routine AHS vaccination program.
Outbreak 3 McCreedy, Hhohho
Date of start of the outbreak 22/03/2019
Outbreak status Resolved (29/07/2019)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 59 5 0 0 0
Affected population Horses are stabled every evening at 1600 hours. The stables are sprayed everyday with insect repellents. The horses are dipped every week. The horses were last vaccinated for AHS in October 2018
Outbreak 4 Manzini, Manzini
Date of start of the outbreak 25/03/2019
Outbreak status Resolved (29/07/2019)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 3 1 1 0 0
Affected population Thoroughbred horses, 5 years of age. No insect control program. Horses last vaccinated in February 2019.
Summary of outbreaks Total outbreaks: 4
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 107 9 1 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Equidae 8.41% 0.93% 11.11% 0.93%
*Removed from the susceptible population through death, destruction and/or slaughter
Epidemiology
Source of the outbreak(s) or origin of infection
  • Vectors
Epidemiological comments Note from the World Animal Health Information and Analysis Department: Swaziland has officially been renamed The Kingdom of Eswatini. However, due to technical constraints, country names cannot be modified in the current WAHIS without altering the integrity of historical data. Thus, the former name Swaziland will be kept until the new version of WAHIS is launched.
Control measures
Measures applied
  • Vaccination permitted (if a vaccine exists)
  • No treatment of affected animals
Measures to be applied
  • Movement control inside the country
  • Quarantine
Diagnostic test results
Laboratory name and type Species Test Test date Result
Onderstepoort Veterinary Institute (OIE Reference Laboratory) Equidae antibody detection ELISA 03/04/2019 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations