TOKYOMELBOURNE (Reuters) – Researchers in Japan and Australia have developed a blood test that detects the toxic protein amyloid beta which has been linked to Alzheimers brain disease.The joint study published in the scientific journal Nature on Wednesday said the test was more than 90 percent accurate.The study was based on 252 Australian and 121 Japanese patients aged 60 to 90 years of age, some classed as cognitively normal, others with mild cognitive impairment and some with Alzheimers.The blood test opens the way for possibly far cheaper and less invasive tests for amyloid beta, which builds up in the brain as Alzheimers develops, said the researchers.

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