FILE - In this Aug. 16, 2007 file photo, a worker harvests romaine lettuce in Salinas, Calif. Leafy green vegetables were the leading source of food poisoning over an 11-year period, federal health ... more 
FILE - In this Aug. 16, 2007 file photo, a worker harvests romaine lettuce in Salinas, Calif. Leafy green vegetables were the leading source of food poisoning over an 11-year period, federal health officials say, Tuesday, Jan. 29, 2013. However, the most food-related deaths were from contaminated chicken and other poultry. (AP Photo/Paul Sakuma, File) less 
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Associated Press | Photo By Paul Sakuma, File
Tue, Jan 29, 2013 11:23 AM EST