As of early July 2026, 31 states in the US have reported cases of cyclosporiasis, an intestinal infection caused by the parasite Cyclospora cayetanensis [1, 2, 3, 4, 5]. Since May 1, the Centers for Disease Control and Prevention (CDC) confirmed 843 laboratory-confirmed cases nationwide, with over 1,500 cases under investigation [1, 2, 3, 5].
Michigan has the highest number of cases, reporting between 1,251 and 1,562 confirmed infections by mid-July 2026. Officials confirmed 44 hospitalizations in Michigan, part of the 86 hospitalizations reported nationwide [1, 3, 4, 6, 5]. "At this time, no specific produce grower, supplier, or type of produce has been identified as the source," said Laina Stebbins, a spokesperson for the Michigan Department of Health and Human Services [6].
Other states with significant case counts include New York, which reported nearly 300 cases by July 8, and Ohio, with approximately 177 cases [3, 6, 5]. No deaths have been reported from the outbreak so far [3, 4, 5].
Cyclosporiasis spreads through food or water contaminated with human feces. Symptoms include watery diarrhea, stomach cramps, bloating, nausea, fatigue, and other flu-like signs. The illness can last several days up to over a month if untreated and may relapse after initial improvement [2, 3, 4, 6]. Foods historically linked to cyclosporiasis outbreaks include raspberries, basil, cilantro, snow peas, green onions and bagged salad mixes [2, 6, 5]. Health officials advise thoroughly washing produce and cooking it above 158°F (70°C) to kill the parasite [2, 4, 5].
The CDC stopped active nationwide monitoring of cyclosporiasis in 2025, making state reporting optional. This complicates efforts to track the outbreak [1, 5]. The CDC stated it is working with states to update case counts as more confirmations come in [5].
The next update on case numbers and the ongoing outbreak investigation is expected as states continue to report new cases and results of their source-tracing efforts.
