[pct-l] CDC recommendations for water treatment

[Bill Burge]

BINGO!  We have a winner!  ;-)

BillB


On Oct 21, 2010, at 8:00 PM, giniajim wrote:

> What was added to the quote was the phrase: ".... i.e. Steri Pen type products." 
> 
> That phrase about the Steri Pen apparently wasn't in the original quote.
> 
> (English non-Major but wannabe jumping in here)...
> 
>  ----- Original Message ----- 
>  From: Quinten Nelson 
>  To: Bill Burge 
>  Cc: PCT MailingList 
>  Sent: Thursday, October 21, 2010 10:57 PM
>  Subject: Re: [pct-l] CDC recommendations for water treatment
> 
> 
>  so.....
> 
>   "is not effective  against Cryptosporidium at normally-used levels."
> 
>  is NOT the same as what is in the original page: 
> 
>  "is not effective against Cryptosporidium at normally-used levels."
> 
> 
> 
>  interesting....
> 
> 
> 
> 
> 
>  ________________________________
>  From: Bill Burge <bill at burge.com>
>  Cc: PCT MailingList <pct-l at backcountry.net>
>  Sent: Thu, October 21, 2010 9:03:57 PM
>  Subject: Re: [pct-l] CDC recommendations for water treatment
> 
>  You need to avoid altering content that you indicate as "transcribing".
> 
>  The line from your post:
> 
>  "5)   Ultraviolet light treatment of water is not effective   against 
>  Cryptosporidium at normally-used levels. i.e. Steri Pen type products."
> 
>  is NOT the same as what is in the original page:
> 
>  "Ultraviolet light treatment of water is not effective against Cryptosporidium 
>  at normally-used levels."
> 
> 
>  That is not transcribing.  It is "interpretation".
> 
>  Steripen's site points to a number of independent tests that DO indicate 
>  effectiveness against cyryptosporidium.
>  http://www.steripen.com/micro-biological-testing
> 
> 
>  BillB
> 
> 
>  On Oct 21, 2010, at 6:34 PM, jcil000-pctchat at yahoo.com wrote:
> 
>> The following recommendations by the Centers for Disease Control (CDC) are 
>> useful in 
>> 
>> the avoidance of infection by Cryptosporidium. 
>> 
>> To avoid Crypto infection, they advise the following:
>> 
>> 1)  That the use of water filters which  an “absolute one micron” filter, or a 
> 
>> filter   certified to remove Cryptosporidium under NSF International Standard  
> 
>> #53 or #58 for either “cyst removal” or “cyst reduction” be used. (see A Guide 
> 
>> to Water Filters for more   information.
>> 
>> 2) That Cryptosporidium is poorly inactivated by chlorine or iodine  
>> disinfection.***
>> ***The product sold by REI called "Potable Aqua / Chlorine Dioxide Water 
>> Purification Tablets" claims effectiveness in four hours.
>> The down side to this product is that it "causes irreversible eye damage" if 
>> the 
>> 
>> user gets residue into his/her eyes.
>> 
>> 3) That boiling at a rolling boil for 1 minute (at altitudes greater than 6,562 
>> 
>> feet   (>2,000 m), boil water for 3 minutes) 
>> 
>> is recommended.
>> 
>> 4)  Cryptosporidium is not killed by alcohol gels and hand sanitizers.
>> 
>> 5)   Ultraviolet light treatment of water is not effective   against 
>> Cryptosporidium at normally-used levels. i.e. Steri Pen type products.
>> 
>> CDC web links below:
>> 
>> http://www.cdc.gov/crypto/gen_info/filters.html
>> 
>> http://www.cdc.gov/crypto/health_professionals/bwa/dialysis.html
>> 
>> If I made a mistake in transcribing this information for my hiking friends, 
>> please post corrections but I think I've summed up their information.
>> 
>> Also, in closing, the weblink shows wording by manufacturers which might be 
>> misleading while reading a product label. Be sure to read that
>> CDC warning.
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