Colorado Health Officials Confirm Cyclosporiasis Cases Are Normal, Not an Outbreak

The wind off the Grand Valley carries the dry, dusty scent of July heat. It’s the kind of afternoon where you check the sky for storms that might break the drought, not for microscopic invaders in your salad. But if you’ve scrolled through social media lately, you might think the air itself is thick with a parasite causing weeks of explosive diarrhea.

It’s not. Not here. Not yet.

Colorado is seeing cyclosporiasis cases. Dozens of them. But don’t let the headlines panic you into buying extra toilet paper. The state is not in the grip of an outbreak. The disease isn’t even the second-most common intestinal parasite we deal with. Giardia holds that title. Cyclospora is a background noise, not a siren.

“We’ve seen about 90 cases so far this year,” Dr. Rachel Herlihy, deputy chief medical officer at the Colorado Department of Public Health and Environment, told the Colorado Sun. “That’s really pretty close to what we see on average when you look at a five-year average.”

The fuss started with a map. The Centers for Disease Control and Prevention published a map showing cases in Michigan, Colorado, and a dozen other states. Reporters looked at that map and wrote headlines like “‘Explosive diarrhea parasite’ spreading across 17 states, CDC warns.” It sounds like a biological weapon moving down the I-70 corridor. It’s not.

The CDC map includes cases that have not been linked to a common source. It’s a collection of scattered dots, not a connected chain. The real outbreak is in Michigan. As of Friday, Michigan reported 1,562 cases. That is the epicenter. Colorado is just along for the ride, picking up a few scattered cases from travelers or imported produce.

The parasite doesn’t jump from person to person like the flu. It hitchhikes on fresh produce contaminated in the field. Lettuce is the usual suspect. You eat it raw. You wash it. The parasite stays. You get sick. It’s that simple.

Herlihy noted that washing helps, though it doesn’t always kill the parasite completely. Cooking kills it. Raw is where the risk lives.

Why the sudden attention? Headlines about bodily functions grab eyes. The CDC recently scaled back a program for tracking certain foodborne illnesses, including cyclosporiasis. That might explain why the data feels laggy or incomplete on their main page. But the bottom line is clear: Colorado is not seeing an unusual spike. We are seeing what we always see.

The confusion stems from mixing up a localized outbreak in the Midwest with a national baseline. If you’re eating local salad, you’re fine. If you’re worried about the air, you’re worrying about the wrong thing.

The short version? Relax. The cases are there. They’re not new. They’re not exploding. And they’re certainly not a crisis for the Western Slope. Just keep eating your lettuce. Wash it well. And ignore the panic.