Health officials are currently trying to determine if a petting zoo at the N.C. State Fair is the common link between five children, three of which live in Wake County, who are infected with E.coli.
From a article:

Gibbie Harris, Wake County’s community health director, says it’s not uncommon for animals that have stepped on their own E. coli-infected feces to then jump on children.
A spokesperson says the Department is currently evaluating the situation.
Harris warns that parents should seek immediate medical attention if their child has bloody diarrhea, as this may be a sign of infection.