Officials said the live bat was found near the Shaw House during the weekend of March 16 and 17.
They said a number of people handled the bat with their bare hands across several locations in Bangor.
That bat later tested positive for rabies.
Those who had direct skin contact with the bat and did not wear gloves or another barrier are at risk of getting rabies, according to a statement from the Maine CDC.
Authorities said rabies is fatal but preventable if treated without delay after the exposure. They said only those who handled the bat with their bare hands are at risk and there is no risk to the public.
Maine CDC officials ask that anyone who had contact with a bat in the Bangor area last weekend contact their healthcare provider to discuss risks and determine if they need treatment. They also can call the Maine CDC directly at 1-800-821-5821.