Hi,
There was a very thorough experiment done a couple of years ago by Daryl
Paulson, that showed the temperature of the water from 45F to 110F had no
effect on the removal of bacteria from the hands. Mike is absolutely right,
it is friction knocking the bacteria loose from the skin and then water
diluting them off the hands.
Pete Snyder
------------
Strang, Mike wrote:
> I'm really enjoying the exchanges concerning the use of hot water for hand washing.
>
> Allow me to add an interesting twist.
>
> My boss's daughter did a hand washing experiment for a school science project. She used various combinations of water temps, detergents, and contact time to compare total plate counts and ATP swabs.
>
> The primary conclusion? Contact time was the most important factor. A quick wash with expensive anti-bacterial soap and hot water was not as effective as a 30 second wash with cool water and no soap. Her study was very amateurish, and probably not scientifically valid, but the results were interesting.
>
> Mike Strang
> Quality Control Manager
> Ducktrap River Fish Farm, LLC
> 57 Little River Drive
> Belfast, Maine 04915
> Mike.Strang@us.fjord.com
> Phone: 207 338-6280
> Fax: 207 338-6288
>
>
>
-- O. Peter Snyder, Jr., PhD Hospitality Institute of Technology and Management 670 Transfer Road, Suite 21A, St Paul, MN, 55114 http://www.hi-tm.com Tel 651-646-7077 Fax 651-646-5984 One Worldwide qualified set of food safety guidelines.
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