Cyclosporiasis is a gastrointestinal disease caused by the microscopic parasite 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. https://www.cdc.gov/cyclosporiasis/php/surveillance/index.html#cdc_generic_section_3-2026-fast-facts