All required steps have been taken to protect consumers, food safety, and the farming and food sectors after BSE was found in Aberdeenshire, Rural Affairs Minister Mairi Gougeon has said.
Movement restrictions at Boghead Farm in Lumsden were introduced last week after so-called mad cow disease was found in one dead animal.
MSP Alexander Burnett asked what assurances could be provided.
Ms Gougeon told the Scottish Parliament a detailed investigation was under way.
The minister also said she planned to visit Thainstone Mart in Aberdeenshire on Friday to discuss any concerns.
It was the first case of its kind in Scotland in a decade.
Ms Gougeon said: "Clearly it is extremely disappointing to have a confirmed case of BSE in Scotland.
"We are taking this very seriously."
She said it showed measures in place were working, and that the results of the detailed tests were not expected for at least a month.
Mr Burnett extended sympathy to the farmer involved - Thomas Jackson - and his family.
Mr Jackson had spoken last week of his "devastation" about the discovery in his beef herd.
The case, involving a five-year-old animal, was identified before entering the human food chain.
The monitoring of BSE has been an important function since the crisis of 1986 when 180,000 cattle were infected and 4.4 million slaughtered in order to eradicate the disease in the UK.
There are understood to have been 16 cases in the UK since 2011, with the last in 2015 when farming officials confirmed a case of BSE in Carmarthenshire, Wales.
Mad cow disease - as it is more commonly known, because of the animals' erratic behaviour and movements - destroys their brains by eating away the nerve tissue.