At least five people fell ill with E. coli O157:H7 after eating at a Longhorn Steakhouse in Green Township, Ohio, in December. Health investigators were not able to definitively determine the source of the outbreak, but suspect leafy greens served at the restaurant, said Mike Samet, public information officer for Hamilton County Public Health. Patients reported initial symptoms between December 10 and 15. Ages of those ill range from 12 to 83 years old. The investigation is now considered over, and the county health department aims to deliver an outbreak report to the Ohio Department of Health in the coming weeks, Samet said.