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‘Explosive Diarrhoea’ Outbreak Grips US: How Researchers Are Hunting Its Source

Health officials have confirmed 1,645 infections since May 1 and say more than 5,100 additional cases are under investigation.

  • Since May 1, 1,645 infections with the parasite Cyclospora cayetanensis have been confirmed nationwide, with 5,100 additional cases under investigation, the Centers for Disease Control and Prevention reported Tuesday.
  • Outbreaks typically occur during summer as the parasite reproduces through egg-like oocysts requiring warm temperatures between 22°C and 32°C to mature; infection spreads when individuals consume food or water contaminated with human feces.
  • Illinois Department of Public Health officials confirmed 277 cases as of Wednesday, including 23 hospitalizations, while Michigan signaled that lettuce or salad greens might be the culprit.
  • The Food and Drug Administration recommends cooking produce to 158 degrees to kill the parasite; cookbook author Meathead Goldwyn advises using a digital thermometer, calling it "the ultimate food safety tool."
  • Molecular parasitologist Joel Barratt, who formerly led the CDC's parasite surveillance team, said "the number of staff working on these outbreaks is not what it used to be," potentially impeding the investigation.
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After the outbreak in the United States, Mayo Clinic revealed what to take and how to stop explosive diarrhea at home and when it is urgent to go to a doctor.

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7,000 cases of ‘explosive diarrhea’ parasite under investigation across the US

The agency says it is aware of 5,100 suspected cases, up from 1,500 earlier this week.

·London, United Kingdom
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24matins.fr broke the news on Wednesday, July 15, 2026.
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