The Iowa Department of Health and Human Services released its latest weekly report showing a sharp rise in cyclosporiasis cases statewide. As of the most recent count, 327 confirmed infections have been identified across 58 counties, marking the highest tally since the outbreak began earlier this year.
Local impact and county breakdown
Dallas County currently reports the greatest number of cases, making it the focal point for local health outreach. County health officials are coordinating with clinics and hospitals to ensure rapid testing and treatment for anyone experiencing symptoms.
What is cyclosporiasis?
Cyclosporiasis is caused by the microscopic Cyclospora parasite, which is typically transmitted through contaminated produce. The CDC notes that the parasite is most often linked to iceberg lettuce that has been washed with unsafe water or handled in unsanitary conditions. Symptoms usually appear about a week after exposure and include severe diarrhea, loss of appetite, weight loss, and fatigue. Because the illness can lead to dehydration and significant discomfort, health officials stress the importance of seeking medical care promptly.
National context
Data from the U.S. Centers for Disease Control and Prevention indicate that 48 states, plus Washington, D.C., have reported at least one case of cyclosporiasis since May 1. Seventeen states—including Iowa, Arkansas, Illinois, Indiana, Kansas, Kentucky, Maine, Massachusetts, Michigan, Missouri, Nebraska, New Hampshire, North Carolina, Ohio, Oklahoma, Pennsylvania, and West Virginia—have documented related diarrheal illnesses tied to the Cyclospora parasite and iceberg lettuce.
The CDC estimates that the national outbreak has resulted in 10,930 cases, 454 hospitalizations, and two deaths, both occurring in Michigan. While Iowa’s numbers represent a fraction of the total, the rapid increase underscores the need for vigilance at the local level.
Historical perspective
For comparison, Iowa’s Cyclospora case counts in recent years have been relatively low: 53 cases in 2022, 52 in 2023, 62 in 2024, and 69 in 2025. The current surge to 327 cases marks a more than four‑fold increase over the previous year, prompting heightened public‑health messaging.
Public‑health response
State health officials are urging residents who experience any of the following symptoms—persistent diarrhea, abdominal cramps, nausea, loss of appetite, or unexplained weight loss—to contact their healthcare provider for testing. Early diagnosis and appropriate treatment can reduce the severity and duration of the illness.
In addition to medical guidance, the department recommends the following preventive steps:
- Wash all fresh produce thoroughly under running water, even if it will be peeled.
- Purchase lettuce and other leafy greens from reputable sources that follow safe handling practices.
- Avoid consuming raw produce that may have been washed with untreated water.
Local health departments will continue to monitor the situation, provide updates, and work with food distributors to identify any contamination sources. Residents are encouraged to stay informed through official health department channels and to report any suspected food‑borne illness promptly.
Original reporting: KCCI Des Moines — read the source article.
