Michigan
The Michigan Department of Health and Human Services (MDHHS) reports, as of today, the cyclospora outbreak case count has reached 1,251, by far the largest numbers in the country.
In addition, this is the largest outbreak in state history, heavily concentrated in Southeast Michigan (including Wayne, Oakland, Washtenaw, and Macomb counties).
The source of the outbreak has not been identified, and MDHHS continues to work with local health departments and partners to investigate cases.
Michigan reports rapid rise in Cyclospora
Ohio
In Ohio, officially, as of July 2, 177 cyclosporiasis cases have been reported in the state in 2026. Of those, 171 cases occurred in June, mostly since June 20.
The surge is tightly clustered near the Michigan border, particularly affecting Lucas County.
Some unofficial reports put the number at more than 400 cases in Northwest Ohio.
New York
New York state has recorded 394 confirmed cases. A massive portion of the state's caseload (273 cases) is concentrated directly within New York City.
North Carolina and Illinois
Both states are reporting in excess of 100 cases each.
Other states recording notable activity include Texas, Colorado (90 cases), and Indiana (72 cases). Health agencies like the Centers for Disease Control and Prevention (CDC) and local health departments are currently investigating the surge.
They advise consumers to thoroughly wash fresh produce—such as berries, basil, and salad greens—under running water, though they note the parasite can be difficult to wash off completely.
Cyclosporiasis is an intestinal illness caused by the Cyclospora parasite. People can become infected by consuming food or water that contains the parasite. Cyclospora infects the small intestine (bowel) and usually causes frequent, watery and explosive diarrhea. The time between being exposed and becoming sick is usually about one week but can range from two days to two weeks or more. Untreated, the illness may last from a few days to more than a month. Symptoms may go away and then return.
Cyclosporiasis is not usually life-threatening, but dehydration from frequent bouts of diarrhea can cause severe illness, particularly among younger or older people and those who have weakened immune systems.