Quicker, Cheaper SARS Virus Detector

ScienceDaily (June 1, 2009) -- Members of a USC-led research team say they've made a big improvement in a new breed of electronic detectors for viruses and other biological materials -- one that may be a valuable addition to the battle against epidemics. It consists of a piece of synthetic antibody attached to a nanowire that's attached to an electrical base, immersed in liquid. If the protein the antibody binds to is present in the liquid, it will bind to these antibodies, immediately creating a sharply measurable jump in current through the nanowire. The result, according to the paper, is a device that can detect its target molecules with a sensitivity as great as the best alternative modes, do so more rapidly and without use of chemical reagents. It is also potentially considerably cheaper than alternatives. Comment: This technology can be an important addition to protection against foodborne illnesses.