Slashdot Mirror
Hot-Air Dryers Suck In Nasty Bathroom Bacteria, Shoot Them At Your Hands (arstechnica.com)
An anonymous reader quotes a report from Ars Technica: Hot-air dryers suck in bacteria and hardy bacterial spores loitering in the bathroom -- perhaps launched into the air by whooshing toilet flushes -- and fire them directly at your freshly cleaned hands, according to a study published in the April issue of Applied and Environmental Microbiology. The authors of the study, led by researchers at the University of Connecticut, found that adding HEPA filters to the dryers can reduce germ-spewing four-fold. However, the data hints that places like infectious disease research facilities and healthcare settings may just want to ditch the dryers and turn to trusty towels. Indeed, in the wake of the blustery study -- which took place in research facility bathrooms around UConn -- "paper towel dispensers have recently been added to all 36 bathrooms in basic science research areas in the UConn School of Medicine surveyed in the current study," the authors note. The researchers speculated that "one reason hand dryers may disperse so many bacteria is the large amount of air that passes through hand dryers, 19,000 linear feet/min at the nozzle. The convection generated by high airflow below the hand dryer nozzles could also draw in room air."
I carry around a small bottle of hand sanitiser (Purell) when I'm out and I keep a larger pump dispenser bottle on my desk to use before and after using someone else's computer, using the toilet, touching door handles, shaking hands with anyone or eating.
Couldn't the problem with these air dryers be solved by having the units suck air from outside of the toilet?