A horse drug dangerous to human health was not in horsemeat used in Findus products on Irish supermarket shelves, tests have confirmed.
The horsemeat that tested positive for "bute" was originally exported in carcass form from Britain, and appeared in the food chain in France.
Tests have shown that the drug was not in horsemeat found in some Findus
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Editor of the Irish Farmers Monthly Margaret Donnelly said the presence of "bute" in the food chain was very worrying.
"Bute is quite dangerous for humans. It can be life-threatening," she said.
Meanwhile, Rangeland Foods in Co Monaghan is withdrawing more burgers which have tested positive for horsemeat.
Tests carried out in the UK show horsemeat content of between 5% and 30% in the burgers.
The FSAI said the burgers, which were all sold to the catering and wholesale sectors, contained product supplied from Poland.