
The outbreak at Sri Prai Farm was confirmed by laboratory tests after the poultry deaths were reported Monday.
As of now, about 20,000 of 50,000 chickens were already culled and 45,000 others were expected to be slaughtered today to contain the virus.
The farm which supplied the fowls to Saha Farm company has four breeding houses and the virus was found in the second breeding house. This was the second time that the virus was found in this farm.
The Livestock department is expected to cull chickens in one to five kilometres radius from the farm.
Meanwhile Pol Col Damrong Phetpong, a senior provincial police chief, said that police will set up checkpoints to ensure that there was no transfer of chickens from the area.