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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 season of flu and some many other germs,we were told again and again that hand sanitizers and soap are the best defense.Last year,Americans spend more than 117 million dollars on sanitizers alone.So we wondered what works best and how did sanitizers compared a show done with soap?Tonight our cheif medical editor doctor Riched Besser puts them to the test and gets some real answers.

Cleaning.As many as 400,000 germs per hand,that's how many bacteria travel with us everyday.So youth university Mariland from secure lab,6 brave graduate student and I volunteerly dust our hands in a toxic brew with thousands of ecal bacteria.Yean,ecal-i.

Something that little odd about raving ecal-i.

To see what will take it off.First step,hands sanitizers,we test two kinds you will find this store. One with 60% alcohol,and one so-called natrual form that containing no alcohol.The key with hands sanitizers is to use enough of it and should take up for 15 seconds or longer to dry.

Now let that air dry OK

Then we pressed our hands onto special incubation plates to grow your bacteria.The results,dramatic.Those green spots are the ecal-i crew from unwanshed hands.After using hand sanitizer with 60% alcohol,but the formula wthout alcohol,just look how many germs are left behind.Alcohol based hands sanitizers worked so mach better because alcohol breaks some of bacteria proteins and kills them.But if you really want to get clean,what's your best of all?That's right,it's your old friend,soap.Soap  not only does as well on bacteria as hands sanitizers,it gets more virues too.Suprisely,study show regular and anti-bacteria soap are about equally affective.But how you use it is crucial.Most of us only spend 5 seconds of the sink.

Stop

Just look how many germs remain.You have to wash your hands for 20 seconds to really get the bulks off.That's singing Happy Birthday twice.So let's review it again.Hands sanitizers are begin central sank,look for one with at least 60% alcohol,but wash with soap,any kind is better as long as you wash for long enough.Doctor Riched Besser,ABC news.College Arc Mariland.
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