Pieces of head pork meat are seen at a market as Thai authorities said on Tuesday that African swine fever had been detected in a surface swab sample collected at a slaughterhouse, in Bangkok, Thailand, January 11, 2022. Thai authorities said on Tuesday African swine fever had been detected in a surface swab sample collected at a slaughterhouse in Nakhon Pathom province, marking the country's first official confirmation of the disease. REUTERS/Chalinee Thirasupa

A butcher carries pieces of pork meat at a market as Thai authorities said on Tuesday that African swine fever had been detected in a surface swab sample collected at a slaughterhouse, in Bangkok, Thailand, January 11, 2022. Authorities launched a probe at the weekend, after growing speculation in recent weeks that the disease was already decimating Thai pig herds and amid accusations of a cover up. REUTERS/Chalinee Thirasupa

Butchers cut pieces of pork meat at a market as Thai authorities said on Tuesday that African swine fever had been detected in a surface swab sample collected at a slaughterhouse, in Bangkok, Thailand, January 11, 2022. One sample had tested positive for African swine fever out of 309 collected, including blood samples from pigs at 10 farms and surface swabs at two slaughterhouses in swine-raising provinces. REUTERS/Chalinee Thirasupa

A vendor sells pork at a stall inside a market in Bangkok, Thailand, January 10, 2022. The confirmation came after Thai authorities had for years denied a local outbreak of the fatal disease that has swept through Europe and Asia in recent years and killed hundreds of millions of pigs. REUTERS/Athit Perawongmetha

Butchers cut pieces of pork meat at a market as Thai authorities said on Tuesday that African swine fever had been detected in a surface swab sample collected at a slaughterhouse, in Bangkok, Thailand, January 11, 2022. REUTERS/Chalinee Thirasupa

A butcher cuts pieces of pork meat at a market as Thai authorities said on Tuesday that African swine fever had been detected in a surface swab sample collected at a slaughterhouse, in Bangkok, Thailand, January 11, 2022. REUTERS/Chalinee Thirasupa