Viet Nam’s pork industry is being devastated by African Swine Fever that has wiped out about 10 per cent of the hog population.
It started with small herds, but now is hitting the huge operations.
"This is a very worrying sign as these farms have tens of thousands or hundreds of thousands of pigs each and therefore the damages would be significant," the government said in a statement.
Authorities culled hundreds of pigs at Phu Son Farm, home to more than 18,000 pigs, said Bach Duc Luu, the deputy head of Vietnam's Department of Animal Health.
China has lost about 20 per cent of its pigs to African Swine Fever and has yet to stop its spread.