African horse sickness,
Thailand

Information received on 03/04/2020 from Dr Sorravis Thaneto, Director General, Livestock Development, Ministry of Agriculture and Cooperatives, BANGKOK, Thailand

Summary

Report type	Follow-up report No. 1
Date of start of the event	24/02/2020
Date of confirmation of the event	27/03/2020
Report date	03/04/2020
Date submitted to OIE	03/04/2020
Reason for notification	First occurrence of a listed disease in the country
Causal agent	African horse sickness virus
Serotype	Pending
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 (2)

Outbreak 1

Ko Chan, Tha Bun Mi, Ko Chan, Chon Buri

Date of start of the outbreak

27/03/2020

Outbreak status

Resolved (24/05/2020)

Epidemiological unit

Farm

Affected animals

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Equidae	33	6	5	0	0

Affected population

Species of horses of different ages and sexes.

Outbreak 2

Hua Hin, Hua Hin, Hua Hin, Prachuap Khiri Khan

Date of start of the outbreak

27/03/2020

Outbreak status

Resolved (07/08/2020)

Epidemiological unit

Farm

Affected animals

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Equidae	145	20	20	0	0

Affected population

Species of horses of different ages and sexes.

Summary of outbreaks

Total outbreaks: 2

Total animals affected

Species	Susceptible	Cases	Deaths	Killed and disposed of	Slaughtered
Equidae	178	26	25	0	0

Outbreak statistics

Species	Apparent morbidity rate	Apparent mortality rate	Apparent case fatality rate	Proportion susceptible animals lost*
Equidae	14.61%	14.04%	96.15%	14.04%

*Removed from the susceptible population through death, destruction and/or slaughter

Epidemiology

Source of the outbreak(s) or origin of infection	Unknown or inconclusive
Epidemiological comments	Under investigation

Control measures

Measures applied	Movement control inside the country Surveillance outside containment and/or protection zone Surveillance within containment and/or protection zone Quarantine Zoning Disinfection Control of vectors Vector surveillance 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
National Institute of Animal Health (National laboratory)	Equidae	reverse transcription - polymerase chain reaction (RT-PCR)	01/04/2020	Positive
National Institute of Animal Health (National laboratory)	Equidae	reverse transcription - polymerase chain reaction (RT-PCR)	01/04/2020	Positive

Future Reporting

The event is continuing. Weekly follow-up reports will be submitted.

Map of outbreak locations