"History has shown that with warm weather comes an uptick in cases of foodborne illness. Plenty of foods at the average summer picnic -- from salad to strawberries -- can contain dangerous pathogens that sicken Americans.
This year, however, the nation did not have to wait for the high temperatures to see a widespread outbreak. In April and May, there was a major recall of bagged romaine lettuce contaminated with a dangerous strain of E. coli. The produce at issue -- served in universities, schools, restaurants and other locations -- was linked to 36 confirmed cases of infection and seven probable cases, resulting in 12 hospitalizations. These reported cases are just the tip of the iceberg since health officials are often not made aware of most foodborne illnesses..."