Sharon Osbourne is terrified she will be struck down with Alzheimer's disease just like her father because a scientific test showed she is at risk of developing the condition.

Osbourne's music mogul dad Don Arden died in 2007 after a battle with the illness and she fears she will suffer the same fate after a recent genome test revealed she has two of the four genes that indicate a risk of the disease.

She tells Britain's Daily Mirror newspaper, "Ozzy and I had these tests done at a university in England, and the results took three months to come back... They test every single cell in your body; it's like Dna test but a million times more sophisticated... the results showed I have two of the four genes that give it (Alzheimer's disease) to you. They're not the two major genes, but they're still there and I have them.

"I was terrified because my dad died from Alzheimer's... it is the most soul-destroying disease. To see someone you love come down with it... it's wicked, it really is... There is nothing I can do to prevent it, nothing. People say to take cod liver oil (supplements) and do puzzles and things, but then I look at people diagnosed with dementia... my father was super active mentally and take Margaret Thatcher, Ronald Regan... they were all so active and that's what really frightens me."

Ozzy Osbourne came out healthier than his wife in the test but discovered he is allergic to alcohol, coffee and dust.