Hayden Walsh, legspinner of touring West Indies, has been found Covid-19 positive in the second test here.
Walsh, who is asymptomatic, tested negative upon arrival in Dhaka on January 10.
However, his second test came back positive, according to a Cricket West Indies statement.
The legspinner had no contact with the other squad members and he is now in self-isolation until he gets two negative results.
"In accordance with the established medical protocols, Walsh remained isolated from the West Indies squad and is now under the care and supervision of the Team Physician, Dr Praimanand Singh," the CWI statement reads.
"All other members of the West Indies touring squad returned second negative COVID-19 tests, after undergoing four tests within the last 11 days," it said.
West Indies began training on Thursday after three days of room isolation at the team hotel in Dhaka.
The three-match ODI series between Bangladesh and West Indies will begin at Sher-e-Bangla National Cricket Stadium on January 20.