A parasite has been causing concern for Americans, particularly in relation to their salads. The parasite, cyclospora, can cause explosive diarrhea and has been linked to thousands of illnesses.

It is not clear what the specific source of the outbreak is, but lettuce has been viewed as a possible threat. People have been wary of eating lunchtime salads or even a single leaf of iceberg lettuce on their burgers.

Further details about the outbreak and its impact are available from the Waco Tribune-Herald.