Key points
CDC, along with state and federal partners, are working together to investigate several outbreaks of cyclosporiasis. Investigations to identify and confirm the sources of the outbreaks are ongoing.
Situation summary
There is a large multistate outbreak of cyclosporiasis occurring in at least four midwestern states. Public health officials are interviewing people linked to this outbreak to find out what foods they ate before getting sick. A specific food item has not yet been confirmed as the source. Investigators are collecting as much information as they can to solve this outbreak.
Important update
Investigation details
CDC, public health and regulatory officials in several states, the U.S. Food and Drug Administration (FDA) are collecting different types of data to investigate a multistate outbreak of cyclosporiasis.
Epidemiologic data
As of July 13, more than 400 people infected with Cyclospora have been reported to CDC from 4 states in connection with this multistate outbreak: Michigan, Ohio, West Virginia, and Kentucky. CDC is aware of additional cases that are still under investigation. Sick people reported symptoms on or after June 22, 2026.
The true number of sick people in this multistate outbreak is likely higher than the number reported, and the outbreak may not be limited to the states with known illnesses. This is because some people recover without medical care and are not tested for Cyclospora. In addition, recent illnesses may not yet be reported as it can take several weeks to determine if a sick person is part of an outbreak.
Public health officials collect many different types of information from sick people, including their age, race, ethnicity, other demographics, and the foods they ate in the week before they got sick. This information provides clues to help investigators identify the source of the outbreak.
What you should do
Call your healthcare provider if you have symptoms of cyclosporiasis
- Symptoms of cyclosporiasis can vary and usually begin about one week after becoming infected (ranging from 2 days to 2 weeks or more).
- Without treatment, symptoms can last anywhere from a few days to a month or longer.
Provide information to help us identify the contaminated food
- If you are sick with cyclosporiasis, local or state health officials may contact you to find out what you ate in the two weeks before you got sick.
Take steps to prevent getting sick with cyclosporiasis
- Learn which foods are more likely to contain cyclosporiasis and ways to prevent getting cyclosporiasis.
- Stay up-to-date on food recalls and outbreaks.
What healthcare providers can do
- Report cyclosporiasis cases to your local health department.
- For more information about clinical features of cyclosporiasis and patient management, see Clinical Care of Cyclosporiasis.