CDC, FDA investigating Cyclospora outbreak across 17 states

The CDC, FDA and state officials are investigating a multistate outbreak of cyclosporiasis, a foodborne illness caused by the parasite Cyclospora cayetanensis. Multiple sources are reporting the outbreak is believed to have been caused by contaminated imported produce, but CDC officials have yet to confirm.

According to the CDC, laboratory-confirmed illnesses reported between May 1 and June 16 have been identified across 17 states, with the investigation ongoing into early July. Health officials have not yet identified a common food source linked to the outbreak, though the CDC notes additional cases are expected to be reported as the investigation continues.

Cyclosporiasis is typically spread by consuming food or water contaminated with the parasite. Past U.S. outbreaks have been linked to fresh produce, including cilantro, basil, raspberries, bagged salad mixes and leafy greens, although no specific commodity has been implicated in the current investigation.

Symptoms generally develop about one week after exposure and may include watery diarrhea, loss of appetite, stomach cramps, nausea, fatigue and weight loss. Some patients experience prolonged or recurring symptoms if left untreated. The illness is not spread directly from person to person.

The CDC recommends consumers thoroughly wash fresh fruits and vegetables under running water before eating, cutting or cooking them. While washing may reduce the risk of many foodborne illnesses, the agency notes it may not eliminate all Cyclospora contamination. Health care providers and public health agencies are encouraged to report suspected cases to help identify potential outbreak sources.