Hong Kong authorities said that they will kill about 2000 small animals, including hamsters, after several tested positive for the coronavirus at a pet store where an employee was also infected.
The city will also stop the sale of hamsters and imports of small mammals, according to officials from the Agriculture, Fisheries and Conservation Department. The pet shop employee tested positive for the Delta variant on Monday, and several hamsters imported from the Netherlands at the store tested positive as well.
According to the US Centres for Disease Control and Prevention, animals do not appear to play a significant role in spreading the coronavirus. But Hong Kong authorities said they are not ruling out transmission between animals and humans.
"We cannot exclude the possibility that the shopkeeper was infected from the hamsters," said Edwin Tsui, a controller at the Centre for Health Protection.
The coronavirus most likely jumped from animals to humans in the first place, but the outbreak became a pandemic because the virus spreads so easily between people. Minks are the only known animals to have caught the virus from people and spread it back, according to Dr Scott Weese at Ontario Veterinary College.
Leung Siu-fai, director of the Agriculture, Fisheries and Conservation Department, said owners should leave hamsters at home, and not take them out. "All pet owners should observe good personal hygiene, and after you have been in contact with animals and their food, you should wash your hands," he said.
"Do not kiss your pets," he added.
Customers who bought hamsters from the store will be traced and be subject to mandatory quarantine. They must hand over their hamsters to authorities to be put down, officials said.
They said all pet stores in Hong Kong must stop selling hamsters and that about 2000 small mammals, including hamsters and chinchillas, will be killed in a humane manner.
Customers who bought hamsters in Hong Kong from December 22 will be subject to mandatory testing and are urged not contact others until their tests have returned negative. If their hamsters test positive, they will be subject to quarantine.
Hong Kong's Society for the Prevention of Cruelty to Animals said it was "shocked and concerned" by the decision to kill the animals, and urged the government not to "take any drastic action before reviewing its approach".
Hong Kong has been grappling with an Omicron outbreak traced to several Cathay Pacific crew members who dined at bars and restaurants across the city before testing positive.
The Government announced late Monday that two former flight attendants have been arrested for leaving their homes during quarantine and later being confirmed to have coronavirus infections. It did not identify their employer, but said the two arrived from the US on December 24 and 25 and "conducted unnecessary activities" while under medical surveillance.
Cathay Pacific said it had fired two crew members for breaching coronavirus protocols. It previously apologised and called their actions "extremely disappointing". The company had to cut back on flights — passenger and cargo — in January because of tightened virus curbs.
The two have been released on bail and will have their case heard in court on February 9. If convicted of violating anti-epidemic regulations, they could face up to six months' imprisonment and a fine of up to 5000 Hong Kong dollars ($950).
Previously in Hong Kong, some air and sea crew members could isolate at home under quarantine exemptions. Regulations were tightened on December 31 to require crew members to isolate in a designated quarantine hotel for about a week.