Lettuce grows in a field October 9, 2006 in Gonzales, Calif. Nunes Co. voluntarily recalled 8,500 cartons of its Foxy-brand lettuce from stores and distributors after irrigation water samples tested positive for the E. coli bacteria. (David Paul Morris / Getty Images)

Food Fears

Lettuce grows in a field October 9, 2006 in Gonzales, Calif. Nunes Co. voluntarily recalled 8,500 cartons of its Foxy-brand lettuce from stores and distributors after irrigation water samples tested positive for the E. coli bacteria.

Credit: David Paul Morris / Getty Images