Surge in Cyclosporiasis Cases Across Multiple States

Overview and Current Statistics

Cyclosporiasis, a parasitic illness causing severe diarrhea, reports rising infections across several states. Michigan is notably affected, with over 1,500 cases and 44 hospitalizations, according to data from the state’s Health and Human Services (HHS) on July 9. This is a significant increase from the usual 50 infections annually.

Ohio has 177 reported cases, Illinois 141, New York 120, North Carolina 110, and Texas 48. The Centers for Disease Control and Prevention (CDC) recorded 145 cases between May 1 and June 16. However, these numbers may underestimate the outbreak due to data lag.

Challenges in Identification and Response

There is an absence of information regarding clustering and common exposures, as stated by David Relman from Stanford Medicine. Surveillance resources deteriorated since 2025, causing a reduction in foodborne illness monitoring.

Reports are inconsistent compared to previous years at similar points in the cyclospora season. Newsweek reached out to the CDC and FDA for comments.

Comparison to Previous Years

Keith Schneider, a food safety expert at the University of Florida, agrees that this year marks a spike in cases. Historical data on cyclospora outbreaks is limited, with a notable surge in Florida in 2022 linked to contaminated lettuce. Previous years, like 2018 and 2019, had higher counts.

In 2026, the infection rates have passed 1,000 cases halfway through the peak season.

The CDC notices a typical rise between May and August due to more fresh produce consumption.

Common Sources of Cyclospora

Fresh produce contaminated by water or human waste often leads to cyclospora infection. Lee-Ann Jaykus from NC State University highlights fresh vegetables, herbs, berries, and mixed foods as common sources. With symptoms emerging a week post-exposure, pinpointing the source is challenging.

Amid investigations, reports suggest Taco Bell may have paused serving certain ingredients like lettuce. Newsweek sought confirmation from Taco Bell.

Precautionary Measures

Avoid contaminated food and water to protect yourself. Washing produce can reduce risks but not eliminate parasites. Symptoms include diarrhea, cramps, bloating, nausea, fatigue, appetite loss, and occasionally vomiting and fever.

The illness can persist and recur without treatment, posing higher risks for individuals with weakened immunity. Avoiding fresh produce until identification of the source could be advisable for immunocompromised people, according to Jennifer Acuff from the University of Arkansas.

Relman stresses the need for preventive measures at farms and removal of contaminated produce from the supply chain. Ensuring food safety demands resources, skills, and commitment.