LEXINGTON, Ky. — Kentucky health officials are investigating a widespread outbreak of cyclosporiasis, an intestinal illness linked to ingesting food or water contaminated with a microscopic parasite, according to a report from UK HealthCare.

The Kentucky Department for Public Health is investigating 100 reported cases statewide, with 61 confirmed cases as of July 13. The outbreak represents a significant spike — the state typically sees approximately 35 cases annually. Between June 14 and July 2, Kentucky reported 67 confirmed cases, nearly double the number usually documented in a full year.

The illness, caused by the parasite Cyclospora cayetanensis, typically begins two to 14 days after exposure with symptoms including watery diarrhea, fatigue and abdominal cramping. People may feel ill for days to a month with symptoms that come and go. Most healthy people recover without treatment, though the illness duration may be prolonged.

While the direct cause for the current Kentucky cases remains unknown, past cyclosporiasis outbreaks have been linked to consuming fresh produce such as raspberries, basil, cilantro and bagged salad mixes. The outbreak is part of a broader multistate concern, with confirmed cases in 31 states as of early July.

Health officials advise people with symptoms to visit their healthcare provider. A common antibiotic called sulfamethoxazole-trimethoprim can treat the illness. For those recovering at home, rest and hydration with electrolyte-containing fluids can help prevent severe dehydration.

The Kentucky Department for Public Health recommends washing all produce thoroughly, buying whole heads of lettuce rather than prewashed bagged lettuce, and throwing away the outer two to three layers of leaves before washing inner leaves under running water. For those prone to infections, cooking produce to 158 degrees Fahrenheit can reduce risk.