Civil Surgeon Dr Sheikh Fazle Rabbi said the test reports from Chittagong Veterinary and Animal Sciences University confirmed the cases.
The 47-year-old Sri Lankan has been working at a garment factory in Karnaphuli Export Processing Zone and living at a rented house in Khulshi residential, Rabbi said.
Two policemen and three Coast Guard personnel are among those infected.
So far, 116 people were found positive for coronavirus in Chattogram. Nine of them died and 32 have recovered, the civil surgeon said.
Also read: Covid-19: Bangladesh reports 790 new cases; 3 deaths
Meanwhile, the country reported 790 new cases in the last 24 hours taking the confirmed cases to 11,719. Three more people died, taking the death toll from the virus in the country to 186 on Wednesday.