Now, restaurants are dealing with the fallout from a cyclospora outbreak linked to shredded lettuce that has sickened thousands of Americans. Taco Bell will likely see the biggest sales impact from the outbreak, which began in late June. Federal health officials first tied the outbreak to shredded iceberg lettuce served at Taco Bell restaurants in Indiana, Kentucky, Michigan, Ohio and West Virginia. Taco Bell said on July 17 that it had voluntarily removed shredded iceberg lettuce supplied by Taylor Farms from its U.S. restaurants. The retail price of a pound of iceberg lettuce jumped nearly 20% between January and June of this year, according to government data.