CDC Reports Over 18,000 Cyclosporiasis Cases Nationwide
The Centers for Disease Control and Prevention (CDC) has reported over 18,000 cases of cyclosporiasis in 45 states across the United States.

San Francisco Oakland San Jose, CA, July 29, 2026 —
The Centers for Disease Control and Prevention (CDC) has announced a significant outbreak of cyclosporiasis, with over 18,000 cases reported across 45 states in the United States.
Cyclosporiasis is an intestinal illness caused by the microscopic parasite Cyclospora cayetanensis. People typically become infected by consuming food or water contaminated with the parasite’s cysts. Symptoms often include watery diarrhea, loss of appetite, weight loss, abdominal cramping, bloating, and fatigue. Nausea, vomiting, and fever can also occur.
The parasite is passed when an infected person defecates, and if those feces contaminate water or food sources, others can become infected. The CDC has been monitoring the spread of the illness, which can sometimes lead to prolonged or relapsing bouts of illness if left untreated. Antibiotics are effective in treating cyclosporiasis.
The number of reported cases indicates a widespread issue affecting a substantial portion of the country. Further details regarding specific sources of contamination, affected demographics, or the timeline of the outbreak beyond the reporting period were not immediately available from the CDC’s announcement.
Public health officials emphasize the importance of proper food handling and hygiene to prevent the spread of cyclosporiasis and other foodborne illnesses. Thoroughly washing fresh fruits and vegetables is a key preventive measure, as produce is a common vehicle for transmission.
Story summarized from the original created by KGO-TVWebTeam@email.disney.com(KGO-TV San Francisco) on abc7news.com, see more information here.
Media gallery