Mark it as a day to remember. The U.S. FDA has awarded de novo marketing authorization for the first in vitro diagnostic (IVD) test for Alzheimer’s disease (AD), enabling diagnosis of the dreaded disease years earlier than current clinical tests. Fujirebio Diagnostics Inc.’s Lumipulse G β-Amyloid Ratio (1-42/1-40) measures specific proteins in cerebral spinal fluid to provide rapid assessment of the risk of amyloid plaques, an indicator of the disease that may develop decades before cognitive impairment occurs.