本帖最后由 wen8023_绿茵场 于 2009-8-8 08:37 编辑
1# 第一万位会员
我们国家在这方面的研究好像比较少，我这里有一篇国外文献。看看对您是否有帮助？！
25/03/2009
Warm air hand dryers increase bacteria on hands
Warm air hand dryers cause an average 254 percent increase in the number of bacteria on the palms of people’s hands as well as contaminating the surrounding area, according to a recent study by University of Westminster in London.
The study also showed that on average, paper towels reduce bacteria on the hands by 77 percent.
The University’s School of Biosciences conducted a study of three different hand drying methods - paper towels, regular warm air dryers and the new generation “jet” air dryers. Each drying option produced radically different results with warm air hand dryers causing an alarming increase in the amount of bacteria found on palms and finger pads.
Warm air hand dryers result in largest bacteria increase
Regular warm air hand dryers performed by far the worst in the tests with an average bacterial increase of 194 percent on the finger pads and 254 percent on the palms. The results suggest a dramatic increase in the amount of the Staphylococcus aureus, a type of bacteria known to cause food poisoning, abscesses, boils and potentially penicillin resistant infections.
Avarage bacteria count of bacteria on hands after washing and drying
University of Westminster senior academic Keith Redway said: “The presence of any type of Staphylococcus aureus on the hands of a worker in the food industry or medical field should be taken seriously as should any increase in its numbers caused by particular hand drying methods.”
Airborne bacteria
The study also tested the new type of “Jet” air hand dryer. “Jet” air hand dryers increased bacteria by an average 42 percent on the finger pads and 15 percent on the palms. The air dryers do not only cause an increase of bacteria, they also contaminated the washroom environment and other washroom users. This is caused by the high airspeeds of up to 400 mph that blow out of the unit. Tests showed that bacteria can spread as far as 2 meters from the “Jet” air dryer while regular warm air hand dryers spread bacteria 0.25 meters.
“The superior performance of paper towels over the two types of dryer in reducing the numbers of bacteria was shown with both the finger pads and the palms of the subjects,” said Keith.
Paper towels are the safest method
The test confirmed that paper towels are the safest method of drying your hands after washing. In all tests, paper showed a reduction of bacteria. The average decrease was 76 percent on the finger pads and 77 percent on the palms. Also, paper is not likely to contaminate the washroom environment or other users.
“Using paper towels results in a significant decrease in the numbers of bacteria on the hands, a clear advantage compared with the increases observed for both types of electric hand dryer tested in this study. In addition, paper towels are far less likely to contaminate other washroom users and the washroom environment,” said Keith.
SCA Hygiene Australasia, Director of Sales and Marketing – B2B Tiffiny Lewin said: “It’s important to maintain hygiene at all times, especially in public areas. We’re pleased that this study has proved that paper towels perform best in this regard. We hope it will raise awareness of the importance of hand hygiene in areas frequented by the public, and by people in regular contact with the public.” | 
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