The pet dog of a coronavirus patient was placed in quarantine on Wednesday after testing "weak positive" for the virus in Hong Kong, according to a government press release on Friday.

If confirmed, it would mark the first case of the virus in a pet animal, as infected numbers topped 82,000 worldwide on Friday and sent U.S. stock markets to their biggest daily drop in history yesterday.

"At present, the AFCD [Agriculture, Fisheries and Conservation Department] does not have evidence that pet animals can be infected with COVID-19 virus or can be a source of infection to people," a department spokesman said.

HAWLEY BREAKS DOWN HIS CORONAVIRUS BILL AIMED AT SECURING MEDICAL SUPPLY CHAIN: 'BRING THEM BACK TO US'

AFCD staff picked up the dog from an apartment in the city and sent it to an animal keeping facility where oral, nasal and rectal samples were collected -- that tested positive for low levels of COVID-19. The dog doesn't have any symptoms of the virus, but the virus can reportedly spread without them showing up.

Further samples will be collected by the AFCD to confirm if the dog really was infected or if the positive test was a result of "environmental contamination" of the animal's mouth and nose, the spokesman said. The pet will be closely monitored.

The department "strongly advise[d]" that the pets of patients infected with the virus should be placed in quarantine for 14 days -- COVID-19's reported incubation period.

SOME CALIFORNIA HEALTH WORKERS HELD IN ISOLATION, QUARANTINE AFTER EXPOSURE TO CORONAVIRUS PATIENT, OFFICIALS SAY

The news brings more uncertainty over the virus, as officials have yet to determine its origin or understand how an infected person could be determined healthy and later test positive -- like the recent case in Japan on Thursday.

Pet owners are advised to maintain a good habit of hygiene and wash their hands "thoroughly" with soap or alcohol sanitizer after touching their animals.

"If there are any changes in the health condition of the pets, advice from veterinarians should be sought as soon as possible," the spokesman said.

CLICK HERE FOR COMPLETE CORONAVIRUS COVERAGE

No other animals are currently at the facility, according to the AFCD release.