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A Pacific Northwest National Laboratory researcher demonstrates the Biodetection Enabling Analyte Delivery System combined with optical detection. The BEADS system has been commercially licensed to companies and can detect botulinum and multiple toxins, such as E. coli, salmonella, and ricin simultaneously.

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Document Title: Toxin Detection System (BEADS)
Category: Health-Related Research and Technologies, Security: Local-National-International
Media Type: Photos
Date of Image/Photo: September 2004
Background: One of the most lethal substances in the world, botulism can be detected using special systems in about 20 to 25 minutes. Researchers at DOE's Pacific Northwest National Laboratory can detect its presence in five minutes, using the Lab's successful Biodetection Enabling Analyte Delivery System (BEADS) combined with optical detection. The detection system includes three critical components. First, BEADS isolates the toxin from environmental samples. Next, an antibody is used to purify and concentrate the pathogen or toxin to enable accurate and sensitive detection. Finally, a second antibody, called a reporter antibody, labeled with a fluorescent dye or a fluorescent quantum dot binds to a different region on the toxin or pathogen. The fluorescence of the quantum dot is measured on the bead and can quantify the concentration of the toxin.
URL of this page: http://picturethis.pnl.gov/picturet.nsf/by+id/AMER-6FJKBP

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