Studies show that Dyson's hand dryer etc. released the virus by 1,300 times when using a paper towel

ByInhabitat

A hand dryer that makes it easy to dry the hand washed after the toilet is installed in a toilet such as a public institution, but if you do not wash your hands thoroughly, the germs attached to your hand will diffuse into the air via the hand dryer , Other users may be inconvenienced. According to the latest study, Dyson hand dryer has been found to release 1,300 times more virus in the air than paper towels.

Evaluation of the potential for virus dispersal during hand drying: a comparison of three methods - Kimmitt - 2016 - Journal of Applied Microbiology - Wiley Online Library
http://onlinelibrary.wiley.com/wol1/doi/10.1111/jam.13014/full

Using a Dyson hand dryer is like setting off a viral bomb in a bathroom | Ars Technica
http://arstechnica.com/science/2016/04/dyson-dryers-hurl-60x-more-viruses-most-at-kid-face-height-than-other-dryers/


The problem of releasing more bacteria in the air compared to wiping hands with a paper towel when wet hands are dried with a hand dryer has been known for many years among researchers. In addition, Dyson hand dryer "Dyson Airblade"It was pointed out that there is a possibility that more virus is spreading in the air than other hand dryers. Unlike bacteria, the virus maintains high infectivity in the air and it is possible to infect organisms in a very small amount.

Patrick Kimmitt and Keith Redway, who are studying biological science at the University of Westminster, conducted experiments to observe how much the virus diffuses into the air after using the hand dryer. First of all, in the hand wearing gloves "Bacteriophage MS 2Then I dried the wet hands in three different ways: paper towel, general hand dryer, Dyson Airblade. Analyzing the ingredients in the air when drying hands, placing a plate with E. coli around the place to dry hands, counted the number of MS 2 infected with Escherichia coli.

MS 2 infects Escherichia coli and kills the bacteria, leaving a hole called plaque (lysate) on the plate. When observing the plate installed next to the place to dry the hand, it turned out that Dyson Airblade was 60 times more plaque than the general hand dryer, and 1300 times more compared to paper towels. When looking at the place where MS 2 spread, 70% of MS 2 diffused in the air seems to be found from the height of the face of the child.


In addition, when wiping wet hands with a paper towel, the virus remaining in the hand hardly spreads to the surroundings, and with a general hand dryer the virus reached at least 25 cm away at best, but Dyson Airblade The virus spreads to more than 3 meters away, the spreading power of the virus is about 20 times that of a general hand dryer, and the number of viruses has reached 500 times. In addition, with Dyson Airblade it has been found that the virus remains in the air for more than 15 minutes, about 50 times more common hand dryers and 100 times the paper towels.

When hand dryers are used with hands that are not washed away, germs will spread to the people who use the hand dryer and next to the hands of the surrounding toilet users, especially those in which many people who are weak are staying It becomes a big problem at the facility. Mr. Kimmitt said in his thesis "careful consideration should be given to how to dry the washed hands in places where special attention should be paid to hygiene and cross infection, such as medical facilities and food manufacturing factories." We are calling for it.

ByRichard Masoner / Cyclelicious

2016/04/19 15:46 Addendum
Since Dyson received the following comment, I will post it.

This investigation method, which the paper towel industry spent four years, is unrealistic and doubtful to spray overly compressed high-concentration virus on the gloved hands, then use a jet hand towel without hand washing It is carried out under conditions.

The Dyson Airblade hand dryer dries hands in 12 seconds with sanitary wind that passed through the HEPA filter installed. The fact that the hygiene level of the Dyson Airblade hand dryer is equivalent to that of using paper towels can be found in the University of Bradford (published in the Journal of Applied Microbiology), Institut de Recherche Microbiologique, the College of Medicine (University of Florida), and Campden BRI etc, Western universities, laboratory facilities have proved in the test.

In addition, Dyson Airblade Hand Dryer is the only hand dryer with P335 protocol certification prescribed by NSF *, an internationally recognized third party certification body in the field of public health and safety.

* NSF International Organization (official name: US Civic Aqueduct-related Member Accreditation Organization) cooperates with industry, government officials and related organizations to establish an independent private non-profit third party that establishes standards relating to public health and safety It is an authentication / testing / standard development agency

In addition, as a supplementary matter from Dyson side, the protocol of P355 seems to be as follows.

【What is P335 Protocol】
The P335 protocol focuses on the following items as a hygienically usable hand dryer:

Air Cleaning: The air blown onto the user's hand guarantees that dust and bacteria are removed.

· Wind at the proper temperature: If you blow hot air on your hand, it takes away the necessary oil from your skin, causing skin hardening and rough skin. The temperature of the wind established by P335 protocol is set to the upper limit temperature close to normal body temperature.

· Sterilization of water: A system that processes collected water.

· Drying time: Guarantee to dry the user's hand within 15 seconds.
Established drying time is generally based on the user's time to dry hands.

· Automatic operation: The hand dryer must have the function of a hands-free operation to interfere by touching the button directly by hand and to reduce the opportunity to press the start button with the possibility of contamination. In addition to this, P335 needs factory audit every year to confirm noise level, heat resistance, regulations concerning cleaning of products, and continuously producing high quality products.

With regard to the above case, Dyson created the movie "hygienic truth about drying hands - Dyson Airblade technology" as follows in 2014, which supports the above case It is getting.

The truth about hand drying hygiene - Dyson Airblade technology - YouTube