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We here describe a method for the simple synthesis of gold nanoparticles (~10 nm in diameter) conjugated with antibody to E. coli O157:H7. Gold nanoparticles with pendant carboxylic acid and alcohol functional groups were synthesized and characterized using transmission electron microscopy (TEM) and infrared spectroscopy. These nanoparticles were then reacted with anti-E. coli O157:H7, using EDC coupling...