US & Europe · Independent Updated August 2026
The Banned in Europe Registry
Explainers

America Stopped Counting the Parasite Spreading Through Its Salads

Cyclospora isn't banned anywhere, because it isn't an ingredient. It's a farm parasite that rides on fresh produce, it gives thousands of Americans explosive summers, and in 2025 the US quietly stopped requiring anyone to track it. Europe mostly doesn't get it. The reasons say a lot about both places.

By 8 min read Explainers

Somewhere in America right now, a few thousand people are having the worst gastrointestinal week of their lives, and most of them ate a salad. The culprit is a parasite called Cyclospora, and the summer of 2026 has been a bad one: thousands of reported cases, clustered hard in Michigan, Ohio, and New York, with the contaminated food not yet identified as of mid-July. It’s the kind of outbreak that would normally come with a running national tally. This year, there barely is one, and that’s part of the story.

Let’s take it in order, because this is one of those topics where the calm version is more useful than the scary one.

What Cyclospora actually is

Cyclospora cayetanensis is a single-celled intestinal parasite. Swallow enough of it and about a week later you get watery, relentless diarrhea, cramping, no appetite, and fatigue that can drag on for weeks if it isn’t treated. It’s miserable, it’s treatable with antibiotics, and for most healthy people it isn’t dangerous.

Two facts about it explain everything else. First, it doesn’t spread person to person. When the parasite leaves one person’s body it isn’t yet infectious; it needs one to two weeks in warm conditions outside a host to mature. That delay is exactly why it can’t pass between people at a stadium or a dinner table, and why it turns up on fresh produce instead, contaminated back at the farm, days or weeks before it reaches your plate. Second, you can’t wash it off and cooking kills it. So it lives almost entirely on raw things: fresh basil and cilantro, raspberries and blackberries, snap peas, and bagged salad mixes and leafy greens. That’s the whole profile. A farm parasite that hitchhikes on the produce we eat uncooked.

The part where America stopped counting

Here’s the twist that makes 2026 strange. In July 2025 the CDC scaled back its main foodborne-illness surveillance program, cutting the list of pathogens it actively tracks and dropping Cyclospora from the mandatory set. Tracking it became optional.

So this summer, the numbers don’t line up. The CDC’s national count sat in the low hundreds through mid-June. Meanwhile individual states, still doing their own counting, were reporting far more: Michigan alone logged well over a thousand cases against a normal year of roughly fifty, with Ohio and New York adding hundreds more. When the federal tally and one state’s tally are that far apart, it means the same thing it always means. The cases are real; the counting isn’t keeping up. We’re in the odd position of having a large national outbreak that no single national number captures, because the country decided a year ago it didn’t need to.

Why Europe mostly sits this one out

This is where the US and Europe genuinely diverge, and it’s the honest heart of the story. In the US, Cyclospora is a recurring domestic summer event, home-grown outbreaks tied to the American produce supply. In Europe, the cases exist but they look different: they’re overwhelmingly travel-related, picked up by people returning from regions where the parasite is common, rather than from the local grocery store.

Two things drive that. One is sourcing. America eats fresh herbs and berries and leafy greens year-round, which means importing a lot of them, in the warm months, from warm-climate growers where Cyclospora circulates. The produce gets contaminated near the farm, and the parasite’s slow-maturing clock survives the trip north. The other is surveillance, and it cuts the honest way. The US looks hard for Cyclospora, or at least it did until last year, so it finds domestic clusters. Most European countries don’t make it a notifiable disease and don’t run dedicated monitoring for it, so a domestic cluster there is more likely to go unnoticed than to be truly absent.

That second point matters enough to say twice. Europe’s cleaner record is partly a real difference in food supply and partly a difference in how hard anyone is looking. This is under-detection, not proven safety, and it’s why you won’t see a tidy US-versus-Europe case-count chart on this page. There isn’t an honest one to draw.

Nothing here is banned

It’s worth being clear, because this site is usually about things Europe bans that America doesn’t. Cyclospora is not one of them. There’s no banned ingredient, no forbidden additive, nothing on a prohibited list. The tools are different: the US controls it through import rules and testing, including the power to hold shipments of fresh cilantro from specific growing regions during the risky season, and a molecular test the FDA uses to screen imported herbs. Europe leans on general food-hygiene rules and, mostly, on not importing the same volumes in the same window. It’s a food-safety-system difference, not a regulatory gap of the usual kind.

So what do you do with this

Not much, and that’s the point of the calm version. Cook your produce and it’s a non-issue. Eating it raw is fine too; the risk in any given salad is low, and this isn’t a reason to fear the produce aisle. Rinsing helps with plenty of things but won’t remove this particular parasite, so the real levers are knowing your outbreak news in season and, if you get a week of unexplained, relentless diarrhea in the summer, telling your doctor to test for it specifically, because a normal workup can miss it.

And since it’s summer 2026 and there are a few million international visitors in the country for the World Cup: no, there’s no connection. Cyclospora doesn’t spread in crowds, and there’s no evidence tying any case to the tournament. The only overlap is the calendar. Peak parasite season happens to be peak salad season, which happens to be now.

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