CDC expands largest known U.S. cyclospora outbreak to 9 states - The Washington Post

What the report says

The Washington Post reported that the Centers for Disease Control and Prevention has expanded what it described as the largest known U.S. cyclospora outbreak to nine states. According to the Post’s headline and available snippet, Illinois, Kansas, Oklahoma and Pennsylvania were newly linked to the outbreak, joining Indiana, Kentucky, Michigan, Ohio and West Virginia. The report was published July 24, 2026.

The limited publicly available text does not provide case counts, the suspected source of exposure, the timing of illnesses or any recall details. It also does not indicate whether state or federal investigators have identified a shared food item or distribution route. The central development supported by the Post’s available reporting is the broadened geographic scope of the CDC-linked investigation.

For context, cyclospora is a microscopic parasite that can cause an intestinal illness known as cyclosporiasis. Public health agencies generally associate outbreaks with contaminated food or water, and past U.S. investigations have often focused on fresh produce. Symptoms can include prolonged diarrhea and other gastrointestinal problems, though specific symptoms among people in this outbreak were not included in the provided Post text.

The expansion matters because a multi-state outbreak can complicate traceback work and may require coordination among the CDC, state health departments, food regulators and affected businesses. Readers should look for updates from the CDC or state agencies for confirmed case totals, exposure guidance and any consumer advisories, because those details were not available in the supplied article text.