first_imgThey found that all four had undergone neurosurgery as children or teenagers, raising fears that they had contracted the protein through surgical instruments, in a similar way to Creutzfeldt-Jakob disease, the human form of mad cow disease.  Sticky brain proteins which are thought to cause Alzheimer’s disease may have been passed to patients by contaminated surgical instruments, scientists believe. Amyloid beta is best known for being one of the hallmark proteins of Alzheimer’s disease,…center_img Researchers at University College London studied the medical records of four adults who had suffered brain bleeds because of a build-up of amyloid beta in the blood vessels of the brain, causing them to rupture.last_img

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