Federal Health Officials Investigate Cyclospora Outbreak in Chicago
Federal health officials are investigating an outbreak of the diarrhea-causing parasite cyclospora in Chicago, which has reportedly sickened 72 people.
Chicago, IL, July 23, 2026 —
Federal health officials have launched an investigation into a Cyclospora outbreak that has affected 72 individuals in Chicago. The Centers for Disease Control and Prevention (CDC) is leading the inquiry into the parasite, known for causing gastrointestinal illness.
Cyclospora is an intestinal parasite that can cause diarrhea, with frequent, sometimes watery, bowel movements. Other common symptoms include loss of appetite, weight loss, stomach cramps or pain, bloating and gas, nausea, and fatigue. In some cases, vomiting can also occur.
The outbreak, centered in Chicago, has resulted in at least 72 reported cases. The specific source of the infection has not yet been identified by health officials. Investigations into potential food or water sources are typically a part of such inquiries.
The CDC and other relevant health agencies are working to determine the scope of the outbreak and identify the likely cause to prevent further infections. Further details regarding the timeline of the infections or the demographic of those affected were not immediately available.
Officials are advising residents to practice good hygiene, including thorough handwashing, especially after using the restroom and before preparing or eating food. Individuals experiencing symptoms consistent with cyclosporiasis are encouraged to seek medical attention and report their illness.
Story summarized from the original created by Stephanie.Weaver@fox.com (Stephanie Weaver) on www.fox32chicago.com, see more information here.
