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Before yesterdayArs Technica

Epic diarrhea outbreak has 40% of Americans avoiding fruits and veggies

By: Beth Mole
27 July 2026 at 16:42

Anti-vaccine Health Secretary Robert F. Kennedy Jr. has made it one of his top priorities to convince Americans to "eat real food," including more fresh fruits and vegetables. But, it's a hard sell when those real foods are causing real eruptions of explosive diarrhea across the country.

The Food and Drug Administration is investigating six outbreaks of foodborne diarrheal illnesses caused by Cyclospora, a unicellular parasite known for spreading from human feces onto fresh produce. Past outbreaks have been linked to leafy greens, fresh basil, fresh cilantro, snow peas, green onions, and raspberries. The Centers for Disease Control and Prevention has tallied a record high of over 11,500 confirmed and probable cases across 41 states, with over 300 requiring hospitalization. And that case total is almost certainly an undercount.

The largest of the outbreaks is linked to Taylor Farms' iceberg lettuce that was sold at Taco Bell restaurants and many other companies. The outbreak has sickened thousands of people across nine states, up from five states identified last week. One of the affected states is Michigan, which alone has reported 9,253 cases as of July 27. The other five outbreaks have no identified source.

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FDA reports new outbreak of explosive diarrhea with 72 cases identified

By: Beth Mole
23 July 2026 at 15:22

The Food and Drug Administration announced on Wednesday that it's investigating yet another outbreak of Cyclospora, the unicellular foodborne parasite behind a nationwide surge in explosive watery diarrhea illnesses. The FDA said 72 cases have been identified in this outbreak, but the agency provided no details on the situation.

This announcement marks the sixth Cyclospora outbreak investigation the FDA has opened this year. Overall, the Centers for Disease Control and Prevention has gotten reports of more than 11,500 cases (including 4,173 confirmed and over 7,400 probable) from 41 states. Among the cases, there have been 308 hospitalizations and no deaths.

This year's tally so farβ€”just in Julyβ€”greatly exceeds the normal number of cases the US sees in a whole year. In recent years, the US has reported between 2,000 and 5,000 cases in a year, according to CDC data. With a new outbreak announced, the tally of cases is likely to continue climbing. Nevertheless, when asked about the national surge in cases earlier this week, anti-vaccine Health Secretary Robert F. Kennedy Jr. said the situation was "under control."

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Β© CDC | Melanie Moser

Michigan's explosive outbreak of diarrheal parasite jumps to over 1,200 cases

By: Beth Mole
9 July 2026 at 17:56

Cases of an explosive diarrheal parasite continue to skyrocket in Michigan, which is reporting 1,251 cases as of July 9. Of those, 44 were hospitalized. Meanwhile, across the border in Ohio, cases are also quickly rising, with news reports of a case total over 500.

The outbreak in Michigan began with two cases reported on June 22 and rose steeply at the start of July. The Michigan Department of Health and Human Services (MDHHS) reported 572 cases on July 4. On Wednesday, July 8, 239 cases were reported, the highest single-day tally so far. The current total of 1,251 cases includes 159 case reports received on July 9.

The epicenter of the outbreak is in the southeastern corner of the state, where health officials from multiple jurisdictions are working furiously to identify and interview cases to track the source, or sources, of the parasite, which spreads through food and water.

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Β© Getty | Grace Cary

Michigan sees explosive outbreak of diarrheal parasite with over 700 cases

By: Beth Mole
7 July 2026 at 18:29

Cases of a diarrhea-causing intestinal parasite have exploded in Michigan over the last two weeks in an outbreak that still has no clear source.

As of July 6, the state has received reports of over 700 cases since June 22, along with 36 hospitalizations, the Michigan Department of Health and Human Services (MDHSS) told Ars Technica on Tuesday.

On June 30, the health department reported 170 cases, which rose to 572 on July 4.

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Β© CDC | Melanie Moser

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