A Co Antrim abattoir at the centre of a foot-and-mouth alert was cleared today.
Tests carried out at the Institute for Animal Health on pig samples taken from the slaughterhouse proved negative.
The results were confirmed this afternoon by the Department of Agriculture.
Movement restrictions and other conditions were imposed by Chief Veterinary Officer Bert Houston at the abattoir and the premises of origin after foot lesions were detected.
Officials believe the symptoms could have been linked to Swine Vesicular Disease, or foot-and-mouth, which paralysed food production and tourism events across the UK in 2001.
The outbreak led to the slaughter of 6.5 million animals, devastated many farms and rural businesses and is estimated to have cost the UK up to £8 billion.