Thirteen people -- mostly children -- came down with E. coli after visiting PNE's petting farm, Vancouver health officials confirmed Tuesday night.
A medical health officer is still investigating and the exact cause has not been determined, Anna Maria D'Angelo, a spokeswoman for Vancouver Coastal Health, told ctvbc.ca.
One child is still in hospital, she said.
A public advisory was not issued because the annual fair had ended by the time health officials were alerted, D'Angelo said.
The incubation period typically lasts only a few days, she said.
Laura Ballance, a spokeswoman for the PNE, said Tuesday night that there has never been a case of E. coli linked to the petting farm.
She said the farm had numerous hand sanitizing units located throughout the petting area, as well as hand-washing stations at the exits. Staff and signs posted throughout the farm reminded visitors to wash their hands, she said.
There was an outbreak of E. coli many years ago at the PNE that was linked to undercooked hamburgers.
Common E.coli symptoms include abdominal cramps and diarrhea.
