The United States is experiencing a record-breaking outbreak of cyclosporiasis in 2026, with the Centers for Disease Control and Prevention (CDC) reporting over 2,500 confirmed cases as of July 22. This surpasses the previous annual high of 2,299 cases set in 2018, according to CDC data.
Cyclosporiasis is an intestinal illness caused by the parasite Cyclospora cayetanensis, typically spread through contaminated food or water. Symptoms include watery diarrhea, loss of appetite, weight loss, and fatigue, which can last for weeks if untreated.
The CDC has linked many cases to imported fresh produce, particularly cilantro and raspberries from regions where the parasite is endemic. Health officials urge consumers to wash all fruits and vegetables thoroughly and to seek medical attention if symptoms persist.
No deaths have been reported in the current outbreak, but hospitalizations have increased. The CDC continues to investigate the source of the infections and advises clinicians to consider cyclosporiasis in patients with prolonged diarrheal illness.
