Pitkin County Health Official Dismisses National Cyclospora Outbreak

“Cyclospora is not new,” said Carly Senst. “For us, this is a pretty routine, non-concerning infection. We’re not seeing anything super alarming. Nothing has changed as far as our response.”

Senst, Pitkin County Public Health epidemiologist, dropped that line to the Aspen Times to cut through the noise of a national cyclospora outbreak that has been making headlines for causing “explosive diarrhea.” The CDC reports 843 confirmed domestic cases since May 1. Colorado’s contribution? One to 10 cases.

Let’s put that in perspective. We’re talking about a fraction of a percent of the national total. The parasite isn’t endemic to the Aspen area, Senst clarified. Most cases here are tied to travel, not the local water supply or the salad bar at your favorite lunch spot. Cyclospora is a microscopic, fecal-orally transmitted parasite. It doesn’t jump from person to person. You eat contaminated food or drink contaminated water, you get sick.

The dramatic spike in national cases might look scary on a news ticker, but on the ground in Pitkin County, it’s business as usual. There is no increasing rate of the gastrointestinal infection locally. The delay in identifying the exact contamination source for the national outbreak — often blamed on the CDC scaling back the FoodNet surveillance system to make reporting optional — doesn’t change the fact that this outbreak would have happened anyway. It just highlights the fragility of national-level surveillance structures.

Senst pointed out that while the headlines focus on the parasite’s ability to cause explosive diarrhea, the symptoms are typically mild to moderate. The real threat to locals isn’t cyclospora. It’s giardia.

“Giardia is everywhere,” Senst said. “I would encourage people to be more concerned about giardia than they are about cyclospora.”

Giardia is endemic to the region. There are multiple cases of it in Pitkin County every year, and it also causes explosive diarrhea. The difference? Cyclospora is mostly an imported issue linked to specific produce like leafy greens, raspberries, and green onions. Giardia is a local fixture.

Prevention for both is straightforward and doesn’t require a PhD in epidemiology. Wash your fruits and vegetables thoroughly. Prioritize cooked vegetables when possible. That’s it. Senst noted that this simple approach prevents really all gastrointestinal illnesses, not just the ones currently dominating the news cycle.

The Aspen Times reported that the county is tracking the situation, but they aren’t sounding alarms. The infrastructure is in place. The data is clear. The risk is low.

For locals, this means you don’t need to panic-buy toilet paper or avoid the grocery store because of a national parasite story. You do need to keep an eye on giardia if you’re drinking from a stream or if local cases tick up, but for now, the cyclospora news is just noise. The county isn’t changing its response protocols. The system is working as intended, even if the national surveillance tools are a bit patchy.

Senst’s message is clear: trust the data, not the headlines. The parasite isn’t new. The risk isn’t rising. And the only thing you really need to worry about is whether you washed your greens properly.