Colorado confirms 90 cyclosporiasis cases statewide

Colorado public health officials have confirmed 90 cyclosporiasis cases statewide, according to reporting published Thursday.

Most of the infections are linked to international travel, and state officials have not identified a distinct in-state outbreak or common source. County-level detail has not been released in the available reporting.

Cyclosporiasis is caused by the parasite Cyclospora cayetanensis and can lead to prolonged watery diarrhea and other gastrointestinal symptoms. The illness typically rises in the summer and has often been tied to contaminated produce in past U.S. outbreaks.

What officials know so far

Axios Denver reported that Colorado had confirmed 90 cases across the state, with no single Colorado contamination event or cluster identified. A Colorado public health spokesperson said the pattern fits the seasonal increase seen with cyclosporiasis.

The case count matters because investigators still do not have a clear source. Travel-linked infections make a single local exposure less likely, but they do not rule it out.

Broader national context

The Colorado report comes amid a broader summer rise in cyclosporiasis cases around the U.S. The CDC said national data through June 16 showed at least 145 cases across 17 states, while state counts were already higher in some places.

National reporting has also pointed to a continuing source investigation as public health agencies try to determine whether any cases are connected to contaminated food or water.

What happens next

Health officials are still watching for county breakdowns, any shared food or restaurant exposure, and whether state or federal investigators identify a common source.

For now, the main public health issue is communication and tracing: confirming whether Colorado’s cases remain isolated travel-associated infections or whether a local exposure emerges.