Experts in the University of Nottingham have been working on the quick and easy test that can be conducted in clinics, revolutionising the prospects of treatment of the degenerative disease.
"Our findings are exciting because they show that it is technically possible to distinguish between healthy people and those with Alzheimer's using a blood test.
As blood tests are a fast and easy way of aiding diagnosis, we are really encouraged by these findings and the potential they hold for the future," said Professor Kevin Morgan from the University.
According to the researchers, potentially the test could be a "cheap and easy pre-screen" test which enabled Alzheimer's to be picked up before symptoms appeared.
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As there is no cure for the dementia associated with the disease, the key to beating it lies in early detection as treatment is more effective at holding off the confusion and memory loss generally associated with old age.
There are several ways the test could benefit patients, including giving people a definitive diagnosis, which is not always possible at the moment, he said adding it could also direct future therapies to make sure patients were getting the most appropriate treatment.
However, the new blood test still has to be validated and it could be a decade before it is used in patients.
"Giving people with dementia an accurate diagnosis is not always easy, and so building up our armoury of diagnostic techniques is vital.