An E. coli outbreak caused by tainted romaine lettuce has sickened at least 23 people in Michigan, Ohio, New York, and now Tennessee.  The number of confirmed cases has risen from 19 last week, according to the Centers for Disease Control and Prevention (CDC).  Seven other reported cases have not yet been confirmed.

The tainted lettuce has been traced to a farm in Yuma, Arizona, and distributors Freshway Foods and Vaughan Foods have voluntarily recalled bagged lettuce from the farm.  The recalled lettuce has a “best if used by” date of May 12 or earlier and was sold in Alabama, Connecticut, the District of Columbia, Florida, Georgia, Illinois, Indiana, Kansas, Kentucky, Maryland, Mississippi, Michigan, Missouri, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Virginia, West Virginia, and Wisconsin.

E. coli can cause such symptoms as diarrhea, abdominal cramps, and bloody stools.  It can also cause a life-threatening condition called hemolytic uremic syndrome (HUS).  Young children and the elderly are most at risk of HUS.

For the full story, go to CNN.