On August 4, the Illinois Department of Public Health announced that 995 individuals in the state have tested positive for cyclosporiasis, a parasitic infection that primarily causes diarrhea. Of those infected, 58 patients have been admitted to hospitals for treatment.
Dr. Emily Landon of University of Chicago Medicine explained that cyclosporiasis is a diarrheal illness that is rarely fatal but can lead to complications, especially in vulnerable individuals. She emphasized that the infection typically produces watery diarrhea, abdominal cramps, nausea, and can persist for several weeks, potentially resulting in dehydration that necessitates hospital care.
State health officials indicated that the confirmed cases were identified through laboratory testing and mandatory disease reporting mechanisms. The department is maintaining active surveillance to track the spread of the parasite and to determine any common sources of exposure. While specific outbreak origins have not been disclosed, officials have reiterated standard food safety recommendations, including thorough washing of fresh produce and proper cooking of meat and seafood.
The disease, caused by the protozoan Cyclospora cayetanensis, is transmitted through ingestion of contaminated food or water. Symptoms usually appear within a week of exposure and can be severe enough to require medical attention, as reflected in the current hospitalization count. No deaths have been reported in this outbreak.
Illinois health authorities continue to monitor the situation and advise residents to seek medical care if they experience prolonged diarrhea or related gastrointestinal symptoms. The department will update the public as additional information becomes available.