St. Louis County Reports 117 Cases of Cyclospora
St. Louis County has reported 117 cases of Cyclospora.
St. Louis, MO, July 30, 2026 — St. Louis County has reported a significant number of Cyclospora infections, with a total of 117 cases confirmed. Cyclospora is an intestinal illness caused by a microscopic parasite. The parasite, Cyclospora cayetanensis, is spread to people typically through contaminated food or water. Symptoms of a Cyclospora infection can include diarrhea, with frequent, sometimes explosive, bowel movements; loss of appetite; weight loss; stomach cramps or pain; bloating; gas; nausea; fatigue; and sometimes vomiting. The illness can last for several days or even weeks, and it can relapse.
The parasite is believed to be transmitted when a person ingests the parasite in contaminated food or water. Outbreaks are often linked to fresh produce, such as berries, herbs, or leafy greens, that have been contaminated, often through irrigation with contaminated water or through direct contact with contaminated soil. The incubation period can range from a few days to over a week after exposure.
Public health officials typically advise individuals experiencing symptoms consistent with Cyclospora infection to seek medical attention. Diagnosis is usually made through stool samples. Treatment often involves antibiotics, such as trimethoprim-sulfamethoxazole, although other treatments may be used if a person cannot tolerate that medication. It is also recommended to stay hydrated and rest during the illness.
Preventative measures include thorough washing of fruits and vegetables, especially those intended to be eaten raw. Careful handwashing after using the restroom and before preparing or eating food is also crucial. While the summary does not specify the source or the timeline of these 117 cases, public health departments often monitor such increases to identify potential sources and prevent further spread. Further details regarding the specific source of the outbreak and any public health advisories beyond the case count were not provided in the summary.
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