From Big League Politics:
The Centers for Disease Control and Prevention (CDC) is investigating a multistate outbreak of Cyclospora, a microscopic parasite that has sickened people across the United States.
Federal health officials have not yet identified the source of the outbreak, though previous investigations have frequently linked Cyclospora infections to contaminated fresh herbs, leafy greens, berries, and other produce.
While investigators continue searching for the source, the illness caused by the parasite can produce severe gastrointestinal symptoms.
According to the CDC, Cyclospora spreads through food or water contaminated with human feces and causes the intestinal illness cyclosporiasis. Symptoms include watery diarrhea, abdominal cramps, nausea, fatigue, loss of appetite, low-grade fever, and vomiting. The agency notes that many patients experience frequent—and sometimes explosive—bowel movements.
According to the CDC’s latest published figures, 145 cases have been identified across 17 states.
New York, Texas, Illinois, and Michigan have reported the highest number of infections. Additional cases have been reported in Alaska, Colorado, Connecticut, Florida, Georgia, Louisiana, Massachusetts, New Jersey, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia, and Wisconsin.
State health departments are now reporting additional cases beyond the CDC’s latest national update, suggesting the outbreak continues to expand.
Michigan health officials say they are investigating a large and growing outbreak, with more than 300 cases reported since June 22—far above the state’s typical annual total of roughly 50 cases.
New York has also reported elevated activity, with more than 100 cases identified since May 1. Officials in New York City say reported infections during the first half of the year have roughly doubled compared to the same period in 2025.


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