Note: Single-source report; awaiting corroboration.
The Centers for Disease Control and Prevention (CDC) continues to monitor a major cyclosporiasis outbreak affecting multiple U.S. states since early May. According to Dr. Gwen Biggerstaff, Deputy Director of the CDC's Division of Foodborne, Waterborne, and Environmental Diseases, at least 1,645 laboratory-confirmed cases of domestically acquired Cyclospora have been reported so far, with cases spanning 34 states. Over 5,100 additional reported cases are under review to confirm if they meet the case definition.
Dr. Biggerstaff noted the outbreak includes a significant cluster in at least four Midwestern states with a likely epidemiological link. Cyclosporiasis is caused by ingesting a microscopic parasite from contaminated food or water, most commonly fresh produce that has not been adequately washed or cooked. The illness does not spread through direct person-to-person contact.
Affected individuals have reported symptoms such as frequent watery diarrhea, abdominal cramping, nausea, loss of appetite, fatigue, and low-grade fever. Symptoms usually appear about one to two weeks after exposure.