An outbreak of E. coli poisoning has expanded to Tennessee, where another person has been sickened after eating romaine lettuce grown on an Arizona farm. The federal Centers for Disease Control and Prevention say there are 23 confirmed cases of E. coli and seven probable cases connected to the this lettuce. 19 had been confirmed by the CDC earlier this week.
The rest of those sickened so far live in Michigan, Ohio and New York. Many were middle school, high school and college students who ate in school cafeterias. There are 10 confirmed cases in Michigan, eight confirmed in Ohio, four confirmed in New York and one in Tennessee. All became ill before late April.
The strain of E. coli involved in the outbreak is rare and difficult to diagnose, so there may be more unreported cases before it is all over.