(Reuters) - British scientists have made a prototype of the most accurate blood test yet for the human form of mad cow disease, and say their work could transform diagnosis and screening of the fatal brain disorder. In an early-stage trial, the prototype, which is 100,000 times more sensitive than previous methods, was able to detect tiny amounts of variant Creutzfeldt-Jakob disease (vCJD)-causing particles, known as prions, in human blood, the scientists said.
