Dr Hargobinda Sarkar Anup, Medical Officer of Upazila Health Complex, said the 46-year-old returned home on April 10 and his samples were collected the next day when he fell sick.
On Monday night, the test report came from the Institute of Epidemiology, Disease Control and Research (IEDCR) confirming his infection, he said.
The patient was sent to Kuwait Bangladesh Friendship Government Hospital.
Dr Anup said they told the family members of the patient and people in the neighbourhood to stay in home quarantine.
Recently, another Tabligh returnee was found to be infected at Tasulla village of the upazila, he said, noting that so far the upazila has recorded three cases.
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Meanwhile, seven more people died from coronavirus in Bangladesh in the last 24 hours till Tuesday, taking the death toll in the country to 46.
Besides, 209 more people tested positive for coronavirus during the period, raising the number of confirmed cases in the country to 1,012.