Cardiff council ordered more than 200 samples to be independently tested, which all came back negative.
BBC: Horsemeat scandal: Cardiff schools and care homes clear
Only last week an emergency vaccination programme was ordered in Cairo after samples of the polio virus were found in sewage - the strain matches that in southern Pakistan.
BBC: Bill Gates: The world can defeat polio
No horsemeat or pig DNA has been found in food samples taken from schools and care homes in Cardiff after tests were ordered by the council.
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