A large Cyclospora outbreak is spreading across the United States in 2026, with cases reported in 45 states and recent investigations pointing to shredded lettuce in nine states. The parasite, known for causing intense diarrhea and other digestive illness, has become a major summer health concern as officials work to trace the source of infections.
According to the report, an estimated 18,000 Americans have been sickened so far this summer. Investigators are focusing on shredded iceberg lettuce as a suspected link in part of the outbreak, though the wider national rise in cases shows the problem extends beyond a single local cluster.
For people searching for foods to avoid during the Cyclospora outbreak, the clearest concern in the current investigation is shredded lettuce tied to the affected states. Consumers are also being urged to stay alert for updated public health notices as officials continue mapping cases and narrowing down possible sources.
Cyclospora infections can be especially disruptive because symptoms often involve severe diarrhea and prolonged stomach problems. With the outbreak now affecting most of the country, the latest case map and food safety updates are likely to remain important as health authorities continue their response.
