Of 24 suspected cases, nine have been confirmed. All nine attended the event.
While officials said the fair was the likely source, they're not sure exactly where it came from. The investigation continues.
Symptoms of E. coli poisoning include diarrhea, abdominal cramping, pain or tenderness and nausea and vomiting.
For more information about E. coli, visit: http://epi.publichealth.nc.gov/gcdc/ecoli.html.