An investigation has been launched after a case of mad cow disease was discovered in Donegal.
The Minister for Agriculture Mary Coughlan says the infected five-year-old cow was discovered in south Donegal last week.
Ms. Coughlan says the case did not occur on a border farm.
This particular case has raised fears amongst farmers as it was born six years after tight controls were introduced to eradicate the brain disease - which can lead to variant CJD in humans.
There have been three previous cases of BSE in cattle born in 2001 but this is the latest case ever seen in Ireland.