Good Vs. Poor Hand Washing: A Graphic Demo

ABC News' Elisabeth Leamy uses E. coli and a Petri dish to show the importance of hand washing.
3:00 | 11/15/12

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Transcript for Good Vs. Poor Hand Washing: A Graphic Demo
-- root of the problem is that can -- so I came here to the university of Maryland's food safety laboratory -- prove a point. I'm gonna put E. Coli bacteria. All over my own here. And then watched for just seven seconds with host helped -- study show that's exactly what most Americans do. And finally I rubbed my hands on this Petri dish. -- Next I repeat the entire process with the E. Coli only this time I -- so. And lather for the entire -- -- seconds that experts recommend. We're pretty please see -- suggests paying your ABC's to reach twenty seconds and be sure to get the backs of your hands. In between your fingers. Around your nail beds. And then flip off the faucet with your alarm. To rile your hands to get the last of the bacteria off. Once again. Touch that plate and I can't wait to see the difference in what browse. Eleven that's something to show you what I watched and for just seven seconds. Look at this. Escape the film that was still left my hands flat wash thoroughly for -- -- mean he's finished he.

This transcript has been automatically generated and may not be 100% accurate.

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