For the record - Sept. 8, 2008

E. coli: A Sept. 1 Health section article about irradiation of spinach and lettuce said that it takes hundreds of millions of E. coli bacteria to make someone sick. In fact, the number for E. coli O157:H7 -- a strain associated with serious cases of food-borne illness -- is far lower than that. The number is estimated to be as few as 10 to several hundred cells.