From Atlanta: Federal officials have pinpointed a source of a parasite outbreak. The parasite, which causes diarrhea, has been linked to lettuce served at restaurants. A warning was issued to consumers in several states, advising them to avoid certain lettuce from a specific restaurant chain.

The affected states include Indiana, Kentucky, Michigan, Ohio, and West Virginia. Lettuce from Mexico is the suspected source of the outbreak. Further information on the outbreak is available from federal health officials, including details on the parasite and the investigation into its source.