A new cluster of Elizabethkingia infection, previously rarely seen in humans, has been found in Illinois, health officials said Wednesday. Testing by the U.S. Centers for Disease Control and Prevention confirmed the Elizabethkingia anophelis infection in 10 Illinois residents, according to the Illinois Department of Public Health. Six of those individuals have died. Most of the infected patients had underlying health conditions, and it's unknown if they died from the infection or pre-existing conditions.