Cyclosporiasis infections are increasing in the US

A parasite capable of causing extreme diarrhea has been found in 18 states, with a particularly large outbreak in Michigan. Though the source of the infections has yet to be identified, experts recommend taking precautions with fresh produce and practicing good hygiene to reduce the risk of contracting the disease.

What is cyclosporiasis?

Cyclosporiasis is a form of food poisoning that comes from the parasite Cyclospora cayetanensis. It can cause “watery, and sometimes explosive, diarrhea and other stomach problems,” as well as a low-grade fever in some cases, said the Cleveland Clinic. Symptoms can start any time between two and 14 days after consuming contaminated food or water. The parasite is more common in tropical countries, but in mid-June, 145 cases were reported in the U.S.

“People became sick after eating food in the United States and did not report any travel during the 14 days before they got sick,” said the CDC. Those infected ranged from ages 5 to 86 years old, and though there have been hospitalizations, there have yet to be any deaths from the condition.

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There has been growing concern about cyclosporiasis because Michigan, “which typically identifies about 50 cases of cyclosporiasis in a year, has reported at least 170 cases” in under two weeks, said CNN. There is “currently no evidence of a single, multistate Cyclospora outbreak linking all cases,” said the CDC. Instead, researchers are “working to identify various potential clusters and sources of illness in multiple states.” Though Michigan has had the most cases, Alaska, Colorado, Connecticut, Illinois, Florida, Georgia, Louisiana, Massachusetts, New Jersey, New York, North Carolina, Ohio, Pennsylvania, Tennessee, Texas, Virginia and Wisconsin have also had reported infections.

Investigators have yet to pinpoint the cause of the current outbreak, but the most likely culprits are “cilantro, basil, plants that grow and that you might put in a salad or use as a garnish,” or “strawberries, blueberries, melons, things that grow in fields,” David Freeman, a professor emeritus of infectious diseases at the University of Alabama at Birmingham, said to CNN.

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What can be done?

If you contract cyclosporiasis, antibiotics can help clear the infection. If not treated, “symptoms may last for a month or longer” and increase the “risk of severe dehydration and other complications,” said the Cleveland Clinic. “With proper diagnosis and treatment, most people feel better after a week or two,” but you “may still have occasional bouts of diarrhea for up to a month.”

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