A rare blood infection is claiming lives, and the CDC can't pinpoint the source. The infection, caused by the Elizabethkingia anophelis bacteria, has killed 17 people in Wisconsin since November and just claimed a life in Michigan, the Detroit News reports. Elizabethkingia is often found in water and soil, but – until now – has seldom caused infections. So far, 54 Wisconsin residents have contracted the infection, CNN reports. "We don't see 48 of the identical organism causing an outbreak like this very often," Michael Bell, deputy director for the Division of Healthcare Quality Promotion at the Centers for Disease...