The cases involve a strain of E. coli that produces Shiga toxin, a type of bacteria that can cause severe gastrointestinal illness and, in some cases, serious complications including hemolytic uremic syndrome, a condition that can lead to kidney failure.

Health officials have not yet identified a single source of the infections, and the investigation is ongoing. The county health department is working to trace potential exposures and determine whether the cases share a common origin, such as a food product, dining location or other environmental source.

Ohio University students and Athens residents are being urged to practice good hygiene, including frequent handwashing, and to seek medical attention if they develop symptoms such as severe stomach cramps, diarrhea — often bloody — and vomiting. Most people recover within a week, but young children, older adults and people with weakened immune systems are at higher risk of severe illness.

Shiga toxin-producing E. coli infections are often associated with contaminated food or water, unpasteurized products, and person-to-person transmission in close-contact settings. University campuses, with their shared dining facilities and dense living arrangements, can be particularly vulnerable to rapid spread.

The investigation is the latest in a series of public health challenges facing the region, and officials are expected to release additional information as the case count and source investigation develop. Community members with questions are encouraged to contact the Athens County health department.

This is a developing story. Check back for updates.