(UPDATED COVERAGE, 4:05 p.m.) Forty-eight cases of salmonella have been confirmed in Illinois, with a possible link to the Subway sandwich chain, which replaced supplies of four fresh vegetables from its restaurants in the state.

Seventeen people were hospitalized but all are recovering, according to a June 7 news release from the Illinois Department of Public Health.

Despite no links found between specific foods and the outbreak, Subway restaurants in the region removed lettuce, green peppers, red onions and tomatoes from restaurants during the period in which people reported getting sick — May 11 to May 25, according to the department — and replaced them with new product, according to a Subway news release.

The Illinois Department of Health is working with the Food and Drug Administration, the U.S. Centers for Disease Control and Prevention, Subway and local health departments to determine the source of the contamination.

All of the people sickened reported eating at Subway restaurants in 14 Illinois counties. No cases were reported in the southernmost region of the state.

UPDATED: Subway investigated as link to salmonella outbreak