US Cyclosporiasis Investigation Expands as States Confirm Involvement
Arkansas and Missouri confirmed involvement in a widening US cyclosporiasis investigation as federal officials continued tracking thousands of confirmed and suspected cases.
In short
- Arkansas and Missouri confirmed involvement in a widening US cyclosporiasis investigation as federal officials continued tracking thousands of confirmed and suspected cases.
The investigation into a major cyclosporiasis outbreak in the United States has widened, with Arkansas and Missouri confirming on Wednesday, August 5, 2026, that they are part of the multistate response.
The Guardian reported that Iowa, Nebraska, New Hampshire and North Carolina were also expected to be added to the outbreak’s scope, although their involvement had not all been independently confirmed in the report. As of July 28, the US Centers for Disease Control and Prevention had recorded 6,707 laboratory-confirmed cases and about 11,500 suspected cases awaiting confirmation across the broader 2026 cyclosporiasis surge.
Cyclosporiasis is caused by the microscopic parasite Cyclospora cayetanensis and is commonly transmitted through contaminated food or water. Symptoms can include prolonged diarrhoea, fatigue, appetite loss, stomach cramps, nausea and fever. Health authorities advise people with symptoms to maintain hydration and consult a healthcare provider.
The Food and Drug Administration has been investigating six outbreaks. It identified iceberg lettuce produced by Taylor Farms de Mexico as the source of one cluster, prompting a voluntary recall covering restaurants in 27 states and grocery stores in 15 states.
Michigan reported the first two US deaths linked to the outbreak on Monday, August 3. The CDC has advised consumers not to eat recalled Taylor Farms iceberg lettuce. The newly confirmed state involvement represents a further development beyond the previously reported deaths and recall.
