Cyclospora Infection

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Cyclospora infection (cyclosporiasis) facts

  • Cyclospora is a small parasitic organism that is passed to humans when they ingest food contaminated with feces from an infected person.
  • It is most common in tropical countries, and imported foods such as lettuce have caused outbreaks in the United States. Travelers to tropical or subtropical countries are at risk, although the risk is relatively low.
  • Diarrhea is the most common symptom, often accompanied by cramping abdominal pain and fatigue. If left untreated, the diarrhea can last for several weeks.
  • The recommended treatment is a seven- to ten-day course of oral trimethoprim-sulfamethoxazole (Bactrim, Septra).
  • Complications are uncommon, but it is important for patients to drink lots of fluids to prevent dehydration.
  • Prevention efforts are focused on improving the safety of the food supply. Because Cyclospora requires a period of time outside the body to become infectious, the organism is not spread directly from person to person.

What is Cyclospora infection?

Infection occurs when humans inadvertently ingest Cyclospora, usually by eating food contaminated with very small amounts of feces (stool) from an infected person.

Medically Reviewed by a Doctor on 5/4/2015

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Berry, Berry, Quite Contrary...Cyclospora Outbreaks

Outbreaks of illness in the United States causing infectious watery diarrhea, nausea, and vomiting recently have been found to be caused by a parasite called Cyclospora. Food-borne outbreaks of the illness have been reported in the U.S. since the mid-1990s.