African horse sickness,
Information received on 19/06/2020 from Dr Sorravis Thaneto, Director General, Livestock Development, Ministry of Agriculture and Cooperatives, BANGKOK, Thailand
Report type Follow-up report No. 12
Date of start of the event 24/02/2020
Date of confirmation of the event 27/03/2020
Report date 19/06/2020
Date submitted to OIE 19/06/2020
Reason for notification First occurrence of a listed disease in the country
Causal agent African horse sickness virus
Serotype 1
Nature of diagnosis Clinical, Laboratory (advanced)
This event pertains to a defined zone within the country
Related reports Immediate notification (27/03/2020)
Follow-up report No. 1 (03/04/2020)
Follow-up report No. 2 (10/04/2020)
Follow-up report No. 3 (17/04/2020)
Follow-up report No. 4 (24/04/2020)
Follow-up report No. 5 (01/05/2020)
Follow-up report No. 6 (08/05/2020)
Follow-up report No. 7 (15/05/2020)
Follow-up report No. 8 (22/05/2020)
Follow-up report No. 9 (29/05/2020)
Follow-up report No. 10 (05/06/2020)
Follow-up report No. 11 (12/06/2020)
Follow-up report No. 12 (19/06/2020)
Follow-up report No. 13 (26/06/2020)
Follow-up report No. 14 (03/07/2020)
Follow-up report No. 15 (10/07/2020)
Follow-up report No. 16 (17/07/2020)
Follow-up report No. 17 (24/07/2020)
Follow-up report No. 18 (31/07/2020)
Follow-up report No. 19 (07/08/2020)
Follow-up report No. 20 (14/08/2020)
Follow-up report No. 21 (21/08/2020)
Follow-up report No. 22 (28/08/2020)
Follow-up report No. 23 (04/09/2020)
Follow-up report No. 24 (11/09/2020)
Follow-up report No. 25 (18/09/2020)
Follow-up report No. 26 (25/09/2020)
Follow-up report No. 27 (02/10/2020)
Follow-up report No. 28 (14/10/2020)
Follow-up report No. 29 (16/10/2020)
Follow-up report No. 30 (26/10/2020)
Follow-up report No. 31 (30/10/2020)
Follow-up report No. 32 (06/11/2020)
Follow-up report No. 33 (14/11/2020)
Follow-up report No. 34 (23/11/2020)
Follow-up report No. 35 (27/11/2020)
Follow-up report No. 36 (04/12/2020)
Follow-up report No. 37 (15/12/2020)
Follow-up report No. 38 (21/12/2020)
Follow-up report No. 39 (04/01/2021)
Follow-up report No. 40 (07/01/2021)
Follow-up report No. 41 (13/01/2021)
Follow-up report No. 42 (21/01/2021)
New outbreaks (1)
Outbreak 1 Pak Kret, Bang Talat, Pak Kret, Nonthaburi
Date of start of the outbreak 10/06/2020
Outbreak status Resolved (22/07/2020)
Epidemiological unit Farm
Affected animals
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 79 1 1 0 0
Affected population Species of horses of different ages and sexes.
Summary of outbreaks Total outbreaks: 1
Total animals affected
Species Susceptible Cases Deaths Killed and disposed of Slaughtered
Equidae 79 1 1 0 0
Outbreak statistics
Species Apparent morbidity rate Apparent mortality rate Apparent case fatality rate Proportion susceptible animals lost*
Equidae 1.27% 1.27% 100.00% 1.27%
*Removed from the susceptible population through death, destruction and/or slaughter
Source of the outbreak(s) or origin of infection
  • Unknown or inconclusive
Epidemiological comments There are three provinces where African horse sickness disease is resolved, including Chaiyaphum, Sa Kaeo and Ratchaburi. The Department of Livestock Development (DLD) updated the latest situation of the African Horse Sickness (AHS) outbreak in Thailand in English language on “Thailand Today”, a national television broadcast program (NBT World channel), on 2 June 2020 at 9 P.M. Eighteen samples (equine blood and serum) were sent to Laboratorio Central de Veterinaria, Madrid (Spain) for checking serotype on the 14th May 2020 and the results were positive for African Horse Sickness (AHS) disease and all eighteen samples were diagnosed as serotype 1 of AHS virus. Those samples were sent by the Department of Livestock Development (DLD, competent authority of veterinary service in Thailand). There are 2 other provinces where Africa Horse Sickness disease is resolved, including Chonburi and Prachuap Khiri Khan. Currently, there are 5 provinces where outbreaks are resolved. Regarding the public private partnership (PPP), three common goals could be achieved through its creation: eradication o this disease in Thailand, control measures on zebra and recovery of AHS free status from the OIE. The strong collaboration from universities, government sectors, and private sectors are essential for setting up the national eradication plan under the order of National Committee for AHS Management which is approved by Ministry of Agriculture and Cooperatives. In addition, to manage clearly AHS risk factors, the Department of Livestock Development has also assigned subcommittees including Technical Subcommittee, AHS control in Zebra Subcommittee, and Vector Control and Research Subcommittee.
Control measures
Measures applied
  • Vector surveillance
  • Control of vectors
  • Disinfection
  • Zoning
  • Quarantine
  • Surveillance within containment and/or protection zone
  • Surveillance outside containment and/or protection zone
  • Vaccination in response to the outbreak (s)
    Administrative division Species Total Vaccinated Details
    Ang Thong Equidae 77
    Chachoengsao Equidae 217
    Chon Buri Equidae 289
    Kanchanaburi Equidae 20
    Krung Thep Maha Nakhon (Bangkok) Equidae 315
    Lop Buri Equidae 190
    Nakhon Pathom Equidae 10
    Nakhon Ratchasima Equidae 1507
    Nonthaburi Equidae 5
    Pathum Thani Equidae 245
    Phetchaburi Equidae 1039
    Phra Nakhon Si Ayutthaya Equidae 196
    Prachin Buri Equidae 65
    Prachuap Khiri Khan Equidae 396
    Ratchaburi Equidae 742
    Sa Kaeo Equidae 101
    Saraburi Equidae 588
    Sing Buri Equidae 29
  • Movement control inside the country
  • No treatment of affected animals
Measures to be applied
  • No other measures
Diagnostic test results
Laboratory name and type Species Test Test date Result
National Institute of Animal Health (National laboratory) Equidae real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 15/06/2020 Positive
Laboratorio Central de Veterinaria (LCV) (OIE Reference Laboratory) Equidae real-time reverse transcriptase/polymerase chain reaction (RRT-PCR) 25/05/2020 Positive
Future Reporting
The event is continuing. Weekly follow-up reports will be submitted.
Map of outbreak locations