A parasitic infection is causing widespread illness, with nearly 1,000 people diagnosed in one state. The infection, which can cause weeks of watery diarrhea, is one of the largest outbreaks in years. No deaths have been reported.

The source of the cyclospora infections has not been determined. Cases have also been reported in several other states, although details of those outbreaks are not available here. Further information about cyclospora and the outbreak is available from the source, including what is known about the diarrhea-causing parasite and the affected areas.