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ancianita

(35,932 posts)
Tue Mar 10, 2020, 11:56 AM Mar 2020

Tips On Hand Washing -- Short Version from Wikipedia

Because we'd be surprised what people know and don't know...

What microbial growth looks like with

A = no washing procedures
B = washing procedures
C = alcohol disinfection





The "German method" of hand disinfections


Hand sanitizers containing a minimum of 60 to 95% alcohol are efficient germ killers.

Alcohol rub sanitizers kill bacteria, multi-drug resistant bacteria (MRSA and VRE), tuberculosis, and some viruses (including HIV, herpes, RSV, rhinovirus, vaccinia, influenza,[29] and hepatitis) and fungi.

Alcohol rub sanitizers containing 70% alcohol kill 99.97% (3.5 log reduction, similar to 35 decibel reduction) of the bacteria on hands 30 seconds after application and 99.99% to 99.999% (4 to 5 log reduction) of the bacteria on hands 1 minute after application.[30]

Hand sanitizers are most effective against bacteria and less effective against some viruses.
Alcohol-based hand sanitizers are almost entirely ineffective against norovirus or Norwalk type viruses, the most common cause of contagious gastroenteritis.[31]

Enough hand antiseptic or alcohol rub must be used to thoroughly wet or cover both hands.
The front and back of both hands and between and the ends of all fingers are rubbed for approximately 30 seconds until the liquid, foam or gel is dry.
As well as finger tips must be washed well too rubbing them in both palms alternatively.


The Center for Disease Control and Prevention in the USA recommends hand washing over hand sanitizer rubs, particularly when hands are visibly dirty.[32]

The increasing use of these agents is based on their ease of use and rapid killing activity against micro-organisms; however, they should not serve as a replacement for proper hand washing unless soap and water are unavailable.

Drying hands matters. Generally, paper towels are cleanest. Blow dryers INCREASE microbe count.

In 2005, in a study conducted by TÜV Produkt und Umwelt, different hand drying methods were evaluated.[45] The following changes in the bacterial count after drying the hands were observed:

Drying method Effect on bacterial count:

Paper towels and roll --- Decrease of 24%
Hot-air dryer --- Increase of 12%


Many different hand dryer manufacturers exist, and hand driers have been compared against drying with paper towels.

Hand washing with wipes[edit]
Hand washing using hand sanitizing wipes is an alternative during traveling in the absence of soap and water.[46] Alcohol-based hand sanitizer should contain at least 60% alcohol.[47]

After washing and drying hands with the warm-air dryer, the total number of bacteria was found to increase on average on the finger pads by 194% and on the palms by 254%.

Drying with the jet-air dryer resulted in an increase on average of the total number of bacteria on the finger pads by 42% and on the palms by 15%.

After washing and drying hands with a paper towel, the total number of bacteria was reduced on average on the finger pads by up to 76% and on the palms by up to 77%.

The scientists also carried out tests to establish whether there was the potential for cross contamination of other washroom users and the washroom environment as a result of each type of drying method.

They found that:

The jet-air dryer, which blows air out of the unit at claimed speeds of 180 m/s (650 km/h; 400 mph), was capable of blowing micro-organisms from the hands and the unit and potentially contaminating other washroom users and the washroom environment up to 2 meters away.

Use of a warm-air hand dryer spread micro-organisms up to 0.25 metres from the dryer.
Paper towels showed no significant spread of micro-organisms.


Microbes. Can't live with them. Can't live without them.

Guess we have to accept less and and and more and .





6 replies = new reply since forum marked as read
Highlight: NoneDon't highlight anything 5 newestHighlight 5 most recent replies
Tips On Hand Washing -- Short Version from Wikipedia (Original Post) ancianita Mar 2020 OP
Watch how surgeons wash their hands -similar to German method Pachamama Mar 2020 #1
This is a great post, and very useful! CaliforniaPeggy Mar 2020 #2
Can't open public restroom doors with a blow dryer. TexasProgresive Mar 2020 #3
Scientists' findings show they're worse than nothing. So just don't use them. ancianita Mar 2020 #5
do this Bucky Mar 2020 #4
haha... ancianita Mar 2020 #6

Pachamama

(16,884 posts)
1. Watch how surgeons wash their hands -similar to German method
Tue Mar 10, 2020, 12:03 PM
Mar 2020

Very thorough washing of all sides and surfaces, back of hand and near wrists and in between fingers.

Not touching anything.

I always can tell if someone is a surgeon in an airport or public bathroom by watching certain methodology of washing because it’s automatic.

Learning todo this kind of thorough washing can save lives.

CaliforniaPeggy

(149,523 posts)
2. This is a great post, and very useful!
Tue Mar 10, 2020, 12:03 PM
Mar 2020

Thank you for sharing it.

I will bookmark it so I can easily find it for future reference.

TexasProgresive

(12,155 posts)
3. Can't open public restroom doors with a blow dryer.
Tue Mar 10, 2020, 12:14 PM
Mar 2020

Also these new ones hurt my ears and try to blow the skin off my hands better than drying them.

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