The Cyclospora Files Updated 5 August 2026  ·  Figures from CDC, FDA & Michigan DHHS

The Cyclospora Files · Listener resources

What we know about
the 2026 outbreak —
and what nobody does.

Latest · Wednesday 5 August, morning

Three things changed on Tuesday, and one of them changed the size of the outbreak.

  • The CDC published its own figures and they are much larger. More than 22,000 people confirmed or suspected, and 517 hospitalisations. Its surveillance page shows 10,468 laboratory-confirmed cases since 1 May plus more than 12,255 still unconfirmed or under investigation. The confirmed count rose by roughly 56% in one week — which is also the explanation for two widely published figures that appeared to contradict each other. They were the same number, seven days apart.
  • The outbreak is being expanded from nine states to fifteen. Arkansas, Iowa, Missouri, Nebraska, New Hampshire and North Carolina are being added, according to the Washington Post, which cites people familiar with the investigation. Missouri alone reports 1,095 cases, roughly double its total a week earlier. The CDC has not published this itself and we are not going to describe it as an announcement until it does.
  • Sysco, the largest food distributor in the United States, has stopped buying iceberg lettuce from Taylor Farms. Its chief executive told Reuters so on Tuesday. This is a commercial judgement, not a regulatory finding — no laboratory test has yet linked any product to this outbreak. It is also the first time anybody with a purchase order has acted on information the rest of us cannot see.

Sources: CDC surveillance and outbreak pages, accessed 5 August · NBC News, 5 August · Washington Post, 4 August · Reuters, 4 August. The full chronology →

More than twenty-two thousand people are confirmed or suspected to have been infected with a parasite this summer. Five hundred and seventeen have been hospitalised and two have died. Six weeks in, eight of the twelve foodborne outbreaks the FDA is investigating still have no identified source.

This page collects everything we used to make the programme, everything a listener might actually need, and an honest account of what is still unresolved. Start wherever your question is.

Established
Not established
22,000+ confirmed or suspected cases nationally — 10,468 of them laboratory-confirmed — the largest cyclosporiasis outbreak on record in the United States.
517 hospitalised nationally, per the CDC’s own figures published late on 4 August.
2 deaths in Michigan, both in people with significant underlying health conditions.
193 hospitalised in Michigan alone since early May — the state figure we used before there was a national one.
1,947 people reported eating the implicated lettuce at Taco Bell across nine states.
Sysco has stopped buying Taylor Farms iceberg lettuce produced in Mexico. A procurement decision by the country’s largest distributor, not a regulatory finding.
Recall issued 17 July by Taylor Farms de Mexico, covering iceberg lettuce from central Mexico.
Tracking made optional. Last summer the CDC's FoodNet programme dropped required monitoring of eight of its ten pathogens, cyclospora among them.
It happened before. In 2013, 631 people were sickened; 239 were traced to bagged salad mix from the same plant in Doctor Mora, Guanajuato.
The company has responded to our questions. Its full statement is published on the sources page.
The source. No positive laboratory test has linked any product to this outbreak. Mexico tested ten samples and found nothing.
What happened in the field. The contamination event in central Mexico has never been identified.
The true case count. A former FDA commissioner estimates the real figure at ten to twenty times what is reported.
Eight of twelve outbreaks. The FDA lists eight concurrent foodborne outbreaks with no identified food at all.
Whether it is over. A senior industry food safety director told a professional conference he fears the peak has not been reached.
Whether it will ever be solved. Most cyclosporiasis outbreaks are not.
What changed at the plant after 2013. The FDA told the company to determine whether this parasite was a “reasonably likely hazard” there. Whether that was ever done is not public.
Eight of our ten questions. The company's statement addresses two. It does not mention the two deaths.
Whether it is fifteen states. The Washington Post reports the CDC is adding six. The CDC has not published it. Both of those things are true at once and we are not going to pick.
Why Missouri doubled in a week, and why the national confirmed count rose 56% in the same week. A genuine new exposure, a testing push and a backlog clearing all look like this and mean completely different things.
Sources: CDC · FDA · Michigan DHHS · Nexstar · Reuters · Forbes · BBC · NBC News · Newsweek · IndyStar · Marler Blog. Full list, including the 2013 primary documents, on the sources page. Figures current 5 August 2026, morning.

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The outbreak in seven figures

22,000+Confirmed or suspected
10,468Lab-confirmed
2Deaths
517Hospitalised, national
45States with cases
9 or 15States in the outbreak
8Outbreaks, no known source
6 wksLag before a case is counted
631Sickened in the 2013 outbreak
CDC surveillance and outbreak pages, figures published late 4 August 2026 and accessed 5 August; Michigan DHHS, 3–4 August; state-count of 45 from the CDC via BBC News, 3 August. These figures disagree with each other for reasons we explain on the next page — and one apparent contradiction between them turned out to be a seven-day gap rather than an error.

Little Hill Podcast  ·  Last updated 5 August 2026

This page is journalism, not medical advice. Case counts move daily and ours will lag. For live figures see the CDC, the FDA outbreak page, and your state health department.

Got something wrong? Tell us — we publish corrections.