Federal public health officials report that the U.S. outbreak of cyclospora, a parasite that causes diarrhea, has expanded to four additional states. Multiple outlets citing the same federal update say the agency links the newly reported cases to shredded lettuce. The announcement comes as officials describe the outbreak as the largest U.S. outbreak of cyclospora to date. The reports indicate that investigators continue to connect illnesses across jurisdictions through case identification and traceback efforts related to the implicated food item. While the specific states are not named in the provided excerpts, the coverage is consistent that four more states are now included in the outbreak’s geographic footprint. Officials are continuing efforts to track the source and reduce exposure, as cyclospora infections can lead to prolonged gastrointestinal illness. The current update reflects ongoing epidemiological work that broadens the number of affected states while maintaining shredded lettuce as the primary suspected vehicle.