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[万花筒] 【整理】2013-02-14&02-17 如何洗手最干净?洗手液-肥皂杀菌效果大对决

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In this sean of flu and so many other germs, we told again and again the hand sanitizers and soap are the best defense. Last year, Americans spend more than 170 million dollars on the hand sanitizers alone. So, we wonder what works the best, and how the sanitizers compared in a showdown with soap. Well, tonight we chief medical editor Dr. Rachel Bass puts them to test and get some real anwers.

Clean? As many as 400,000 germs per hand. That's how many bacterial travel with us everyday. "Here's a Lab" So Yale university Melin from safty lab. 6 brave graduates students tonight volunteerly dust the hands in a toxical brew, thousand of Ecoli bacterial (yeah). Ecoli? (good)

Something is now little odd about rubbing Ecoli. Yeah. To see what we will take off. First up, hand sanitizers. We cast two kinds you find in this store. One with 60% of alcohol. And one socalled natural formula that containing no alcohol. OH, that's good. The key with hand sanitizers is to use enough of it. Your hands should take up for 15 seconds or longer to dry. Now let that airdry, ok? Then we press our hands onto a special incubation plates to grow and remain bacterial. The results dramatical. Here: those green spots of the Ecoli, they grow from unwashed hands. After, using hand sanitizers with 60% of alcohol, but the formula without alcohol just look at how many germs left behind. Alcohol-based hand sanitizer just work so much better because alcohol breaks up the bacterials proteins, they kills them. But if you will really want to get cleaned, what's your best of all. Guess what? It's your old friend : soap. Soap not only does it as well bacterial as sanitizers, it gets more viruses too. Surpprisingly, study show regular and the anti-bacterial soap about equally effective. But how you are using it is crucial. We go! Most of us only spend 5 seconds of the sink. Ding, Stop! just look at how many germs remain. Yack! Go! you have to wash your hands for 20 seconds to really get bugs off. And yes, that singing happy birthday twice. So, let's review again. hand sanitizers if you can get to a sink, look for one with at least 60% of alcohol, but wash with a soap any kind is better as long as you wash for long enough.

Dr.Richard Besser, ABC news, Collegue Park of Maryland.
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