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Cyclospora illnesses spike in the US

As of July 13, 2021, 208 laboratory-confirmed cases of cyclosporiasis in people who had no history of international travel during the 14-day period before illness onset have been reported to CDC by 23 jurisdictions, including 22 states and New York City.

The median illness onset date is June 17, 2021 (range: May 1, 2021–July 3, 2021).

At least 21 people have been hospitalized; no deaths have been reported.

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Related Resources

Cyclospora Food Poisoning

What is Cyclospora cayetanensis? Cyclospora cayetanensis is a unicellular, microscopic parasite that can cause food- or water-related gastrointestinal illness. The oocyst form of the parasite is chlorine-resistant and must sporulate...

Epidemiology of Cyclospora

Cyclosporiasis is an intestinal illness caused by the protozoan parasite Cyclospora cayetanensis, which is transmissible by ingestion of food or water contaminated with sporulated oocysts. Most cases of cyclosporiasis occur...

Cyclospora’s Mode of Infection

The modes of transmission of C. cayetanensis are still not completely understood. Direct person-to-person transmission is unlikely because the oocysts are not infectious when initially shed (unlike Cryptosporidium, another foodborne...

Symptoms of Cyclospora Infection

What are the typical symptoms of Cyclospora infection? Cyclospora infects the small intestine (bowel) and usually causes watery diarrhea, bloating, increased gas, stomach cramps, flatulence, loss of appetite, nausea, low-grade...

How is Cyclospora Diagnosed?

Cyclosporiasis is usually diagnosed symptomatically in clinical settings, including the presence of watery diarrhea, abdominal cramping, and bloating. In untreated, immunocompetent people, the diarrhea can last from days to weeks...

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