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Outbreak of Diarrhea From Parasite Expands to More States as US Cases Soar Beyond Last Year’s Level

Health officials are tracing produce through the supply chain as 1,645 cases and 141 hospitalizations are confirmed nationwide.

  • The Centers for Disease Control and Prevention reported 843 cases of cyclosporiasis across the United States since May, with officials warning that case counts are expected to rise as "multiple jurisdictions" report increases compared to last year.
  • Cyclospora, a microscopic parasite that contaminates fresh produce, has caused over 400 cases in New York State alone, though the Department of Health noted there is no evidence of a single outbreak linking all infections.
  • Reported cases likely represent a "tiny fraction of the real number," according to Dr. Bruce Farber of Northwell Health, because many people with symptoms do not seek testing. The infection causes "bad diarrhea, nausea, muscle aches, malaise" that can ruin a vacation.
  • Gastroenterologist Dr. Jason Korenblit emphasized that oral rehydration solutions are the best option for persistent diarrhea, delivering the precise balance of sodium, glucose, and fluids needed for absorption over high-sugar sports drinks.
  • To prevent infection, the CDC recommends washing fresh produce under running water and maintaining good hand hygiene before preparing food. While generally not life-threatening, the Department encourages New Yorkers to follow these best practices, especially during the summer months.
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(San Francisco = Yonhap News) Correspondent Kwon Young-jeon = The incidence of cyclosporiosis, a parasitic infection, is surging in the United States.

·Seoul, Korea (the Republic of)
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On Tuesday, the Centers for Disease Control and Prevention (CDC) issued a health alert to the increase in cases of ciclosporiasis acquired within the country, a gastrointestinal disease caused by the microscopic parasite Cyclospora. Since May 1, the agency has received reports of 1,645 confirmed cases in 34 states, in addition to having recorded more than 5,100 additional cases that continue under analysis to determine if they correspond to infe…

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USA Today broke the news in New York, United States on Monday, July 13, 2026.
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