"These results indicate that many kinds of bacteria, including potential pathogens and spores, can be deposited on hands exposed to bathroom hand dryers and that spores could be dispersed throughout buildings and deposited on hands by hand dryers", the study concluded.
So how exactly do fecal particles end up in the hand dryers? The results were published this month in the journal Applied and Environmental Microbiology.
Now imagine a public restroom with many toilets releasing human waste bacteria into the air. How many bacteria in the apparatus that the researchers suggest to wipe his hands with a towel, reports the Chronicle.info with reference to the news of Yu.
In the study, researchers searched 36 bathrooms at the University of Connecticut School of Medicine for a harmless, lab-engineered strain of bacteria Bacillus subtilis called PS533.
These bacteria came from bathroom air, and it included some that can cause disease. They showed growth of just one or less bacterial colony. The numbers of bacteria were higher than those found in the air of bathrooms that didn't have hand dryers, Newsweek reported. For this reason, many opt to use hand dryers to dry their hands, especially if the dryers are touchless. The hand dryers apparently not only blow out hot air, they also "suck in" air that's in the bathroom, the article states.
A new study conducted by researchers in the University of CT showed that hand dryers expel a lot of harmful bacteria back onto your hands.
For now, Setlow is sticking to paper towels-as is the University of CT, which has added them to all 36 bathrooms surveyed in the study.