Foodborne illnesses at restaurant chains are rare but can sicken customers, roil businesses

Federal health officials linked a cyclospora outbreak to iceberg lettuce from Taylor Farms served at Taco Bell locations in five states. The FDA identified the supplier, prompting Taco Bell to remove the ingredient nationwide. Past outbreaks at McDonald's, Wendy's, and Chipotle involved E. coli linked to onions and lettuce from Taylor Farms and other suppliers.