Costco: FDA Tests Point Toward E. Coli in Salad Vegetables

Testing has pointed toward a vegetable mix from a California food wholesaler as the source of E. coli in Costco chicken salad that has been linked to an outbreak that has sickened 19 people in seven states, a Costco official said Wednesday.

Craig Wilson, Costco vice president of food safety and quality assurance, said he was told by the Food and Drug Administration that the strain of E. coli seems to be connected to an onion and celery mix.

The company uses one supplier for those vegetables in the chicken salad sold in all its U.S. stores, Wilson said.

One additional test is needed to confirm that the vegetables carried the same E. coli strain connected with the outbreak, he said.