U.S. health authorities are investigating an outbreak of diarrheal illness caused by the parasite Cyclospora (cyclosporiasis), with cases reported across dozens of states. Multiple outlets report the outbreak has sickened at least 1,200 to 1,700 people, depending on the date of reporting, and that infections are spreading beyond initial locations. Reports also describe severe gastrointestinal symptoms, including “explosive diarrhea,” and note that some patients are hospitalized. Coverage highlights mapping efforts showing cases in many areas and notes that investigators are working to determine the source of the contamination. Several reports emphasize that officials are still identifying which foods or other exposures are responsible, and explain that the specific vehicle for transmission is not yet confirmed publicly. Information pieces also provide guidance on how people can reduce risk, including food-safety precautions and seeking medical evaluation when experiencing symptoms consistent with the illness. Overall, the reporting describes a growing multistate outbreak, ongoing CDC investigation, and continued updates on case counts and geographic spread.