Professor Field explains that 90% of human infections use carbohydrate recognition to bind with targets in the body. The sensor is a suspension of sugars tagged with gold particles. If the flu virus is present, it will attach to a sugar, pulling particles closer together. Human and avian flu have a preference for different sugar chains resulting in a colour change visible to the naked eye.
12 December 2013 - Flu sends scientists dipping for gold
Image credits: Norwich Research Park
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