FILE – This colorized 2006 scanning electron microscope image made available by the Centers for Disease Control and Prevention shows E. coli bacteria of the O157:H7 strain that produces a powerful toxin which can cause illness. At least a dozen people in California and Washington have been sickened with E. coli food poisoning linked to organic walnuts sold in bulk in 19 states, U.S. health officials said Tuesday, April 30, 2024. Stores included chains such as Whole Foods and Market of Choice. (Janice Haney Carr/CDC via AP, File)
