As of June 16, 2026, 145 cases were reported in people who acquired cyclosporiasis in the United States. Cases were reported by 17 states. These people became sick after eating food in the United States and did not report any travel during the 14 days before they got sick.
Sick people ranged in age from 5 to 86 years, with a median age of 42, and 61% were female. The median illness onset date was May 13, 2026 (range: May 1 – June 6). Of 145 people with information available, 20 were hospitalized. No deaths have been reported.
Local, state, and federal (CDC, FDA) public health authorities are investigating several clusters of cases in more than one state. Investigations to identify potential sources are ongoing.
The map shows where the 145 people with cyclosporiasis acquired in the United States since May 1, 2026, lived. Cyclosporiasis cases may not be limited to these states with known cases. The true number of people sick with cyclosporiasis was likely higher than the number reported. This is because some people recover without medical care and are not tested for Cyclospora.
Cyclosporiasis is a nationally notifiable disease and is reportable in 47 states, the District of Columbia, and New York City. Even if it is not reportable in a state, it is important for healthcare providers and the public to inform local health departments about potential cases and clusters of the disease so that they can take appropriate action to prevent additional cases.
CDC, along with state and federal health and regulatory officials, monitor cases of cyclosporiasis year-round to detect outbreaks linked to a common food source in the United States. This aids in swiftly identifying and investigating outbreaks in the United States. Cyclosporiasis also can be acquired when people eat or drink contaminated food or water during travel outside the United States. CDC and other agencies are working to further develop and validate molecular-level tools for linking Cyclospora cases.
Case counts rise during the spring and summer months; therefore, the cyclosporiasis season is considered May 1 through August 31. Clusters of cyclosporiasis cases have been detected outside this range in some years. In 2026, outbreak season began on May 1.