CDC Reports Over 400 Cyclospora Cases Across 18 U.S. States

The U.S. Centers for Disease Control and Prevention (CDC) is investigating a surge of cyclosporiasis, a parasitic infection that causes “explosive” watery diarrhea. More than 400 cases have been confirmed in 18 states, with 20 hospitalizations but no deaths reported.

Michigan has seen an especially large outbreak, reporting over 300 cases since June 22, far above its typical annual total of about 50. New York has recorded 107 cases since May 1, and other states including Texas, Illinois, Alaska, Colorado, Florida, Georgia, Louisiana, Massachusetts, New Jersey, North Carolina, Ohio, Pennsylvania, Tennessee, Virginia and Wisconsin have reported cases. The parasite, Cyclospora, spreads through raw produce or water contaminated with human feces. While generally self‑limiting for healthy individuals, it can be severe for immunocompromised patients, such as those with HIV/AIDS.

The CDC is working with the Food and Drug Administration and local health agencies to identify sources, which are suspected to include fresh herbs, berries and other produce typical of the May‑August peak season. Public health advice emphasizes thorough washing of fresh produce, hand hygiene, and seeking medical care if symptoms develop.