|Source of the outbreak(s) or origin of infection
||Four samples (equine blood and serum) were sent to the Pirbright Institute (United Kingdom) for checking serotype on the 31st March 2020 and the results were positive for African Horse Sickness (AHS) disease and all four samples were diagnosed as serotype 1 of AHS virus. Those samples were sent by a private veterinarian. However, the Department of Livestock Development (DLD, competent authority of veterinary service in Thailand) will send more samples from other outbreak spots to check the serotype in two or more OIE Reference Laboratories for AHS soon.
The Department of Livestock Development started vaccination against African Horse Sickness (Polyvalent live attenuated vaccine) on April 19, 2020. Horses within the Horse and Animal Breeding Station, Thai Red Cross Society, Cha-am District, Phetchaburi Province, supplying 560 horses used to produce immunoglobulins to treat rabies and snake venom, were the first one to be vaccinated with AHS vaccine in Thailand. The further AHS vaccination started from April 20, 2020 which will be conducted for horses at a distance of 50 kilometers from the disease sites in 7 provinces where an outbreak was discovered. The AHS working group conducted a preparatory meeting with targeted Regional, Provincial, and District Livestock offices and related parties before the vaccination. The meeting emphasized on the operation for effective vaccination to struggle against the AHS epidemic as quickly as possible.