At least two children from Rush County are critically ill after getting E. coli poisoning, and health officials are now looking into whether the children got sick at the Rush County Fair.

Four-year-old Kathleen Ragan (right) is at Peyton Manning Children’s Hospital in Indianapolis, undergoing dialysis for hemolytic-uremic syndrome. She’s one of four reported cases of E. coli. Fox59 News has received reports that Kathleen along with three other children may have contracted the disease while attending the county fair.

Kathleen’s mother says she did use hand sanitizer as she petted animals there, but her symptoms of fatigue, diarrhea and bloody stools started the day after the fair ended.