"Our main priority has always been to make sure the farm is safe for everyone who comes here to visit," he said.
Farm manager Richard Oatway's full statement
"All the staff at the farm are very upset about the E.coli outbreak and we hope that all the children make a full and speedy recovery."
Health officials said there had been 36 reported cases of E.coli so far, in what one spokesman described as one of the largest seen in the UK.
Mr Oatway said he didn't know when the farm would reopen, adding: "We will not reopen the farm until we are satisfied that we have got to the root of the problem and have put in place suitable control measures."