The Knox County Health Department (KCHD) is concluding its investigation into a cluster of Escherichia coli (E. coli) O157 infections. Fifteen confirmed cases of E. coli O157 were reported to KCHD recently. All cases were among children, nine were hospitalized and seven developed a complication of the infection called Hemolytic Uremic Syndrome (HUS). Of the children who were hospitalized, one remains in fair condition at East Tennessee Children’s Hospital. Lab results from the Tennessee Department of Health have confirmed two different strains of E. coli O157 caused the children to become ill.