While the CDC is reporting that there are 1645 confirmed cases of cyclosporiasis in the U.S., there are currently no outbreaks of the infection in the area, according to RaeAnn Tucker, director of health promotion for the Henry and Stark County Health Departments.
Cyclosporiasis is an intestinal illness caused by the microscopic parasite Cyclospora cayetanensis. Outbreaks in the U.S. have been tied to imported fresh produce, and cases are also commonly reported among people who traveled internationally before becoming ill.
Tucker said health officials typically see a seasonal increase in cyclosporiasis cases from May through August.
“Cyclospora outbreaks in the United States, including in Illinois, have been linked to various types of imported fresh produce,” Tucker said. “Good common food safety measures such as proper and frequent handwashing, washing raw vegetables, and cooking vegetables are a great continued practice.”
The Illinois Department of Public Health (IDPH) is reporting a higher‑than‑average number of cases this year, consistent with trends seen in several other states. Health officials say no single source has been identified, and there is no evidence of a large outbreak responsible for most of the cases.
As of July 17, Illinois has reported 309 probable cases. Of those, 125 involve individuals who traveled outside the U.S., 152 are believed to be domestically acquired, and 32 involve unknown travel history. No deaths have been reported, though 16 people have been hospitalized.
Illinois health officials continue to work with the CDC and other partners to identify trends. In the meantime, IDPH urges residents to follow safe food‑handling guidelines, including:
Cyclosporiasis is a reportable condition, meaning health care providers and laboratories must notify local health departments. IDPH and local officials investigate cases through detailed interviews, identify potential outbreaks, and work with federal partners to determine possible sources.
The average incubation period is seven days, though symptoms can appear anywhere from two days to two weeks after exposure. Cyclospora infection can cause watery diarrhea, weight loss, fatigue, anorexia, nausea and abdominal cramps. Symptoms may last a few days to more than a month and can recur. Most people with healthy immune systems recover without treatment, though an effective antibiotic is available.
