Wal-Mart Sued Over Listeria Death Prompts Costco Checks

Wal-Mart Sued Over Listeria Death Prompts Costco Checks

Tim Boyle/Bloomberg

Shoppers browse items at a Costco Wholesale Corp. store in Chicago, Illinois, U.S. Costco is extending to cantaloupe a “test and hold” screening program it set up for other ready-to-eat produce.