PINE BLUFF, Ark. (AP) — The Arkansas Department of Health has confirmed that 52 patients recently treated at Arkansas Cancer Institute have tested positive for a previously unknown bacterial infection, and more than 100 others are at risk.

Three patients who tested positive for the infection have died, though it's unknown whether their deaths were caused by the bacteria or other illnesses, the Arkansas Democrat-Gazette reported. The Pine Bluff treatment center outbreak was discovered among people who have ports, or implanted devices that give access to the bloodstream to administer medication...