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Subject: Market Farming
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- From: KAKerby AT aol.com
- To: market-farming AT lists.ibiblio.org
- Subject: Re: [Market-farming] manures/GAP training
- Date: Wed, 3 Mar 2010 13:35:32 EST
Here is a link to the paper they cited in class:
Here is the title of that same paper, in case the above link gets
butchered:
Survival of Escherichia coli O157:H7 in soil and on carrots and onions grown in fields treated with contaminated manure composts or irrigation water, by Mahbub Islam, Michael P Doyle, Sharad C Phatak, Patricia Millner, and Xiuping Jiang, Food Microbiology 22 (2005) 63-70 Merely searching Google on "survival of escherichia coli soil" came back
with a bunch of different studies, so there's quite a few to choose from.
As to your point about 'not all E coli are dangerous, and in fact most are
beneficial', yes that is absolutely correct and that was discussed
in class. The general point is that, soil does NOT naturally carry E
coli as part of the normal microbiological flora. Only soils which have
been pooped on (or irrigated with contaminated water) within the last 200
days, will carry E coli of any variety. If Farmer Joe's production
systems allow for E coli of any variety to get into his soil, then by definition
at least some of his fields could have been contaminated by E coli from the more
dangerous strains. In other words, if Farmer Joe's fields can be
contaminated by poo, then it's only the luck of the draw whether that poo will
have come from an animal which carried the most dangerous strains. The
whole point of the class was to show us how that contamination can occur, how
long that contamination can last, and what we can do to minimize it.
Ironically, pastured animals were just one of the significant threats.
Employee personal hygiene was a huge factor because merely going to the restroom
then coming back to pick crops could introduce contamination to otherwise clean
fields. We don't have employees here other than myself, so that part of
things didn't rate very high on my personal radar because I can change my own
handwashing habits as needed. But the animal manure really hit home
because that's something that we use a lot of. If folks have no animals,
no animals upstream, and 50 employees, their risk assessment and risk management
needs will be a lot different than mine.
Kathryn Kerby
Frog Chorus Farm
Snohomish, WA
In a message dated 3/3/2010 9:32:41 A.M. Pacific Standard Time,
organic87 AT frontiernet.net writes:
|
-
Re: [Market-farming] manures/GAP training
, (continued)
-
Re: [Market-farming] manures/GAP training,
Roots Farm & Karen Sutherland, 03/04/2010
- Re: [Market-farming] manures/GAP training, William H Shoemaker, 03/04/2010
-
Re: [Market-farming] manures/GAP training,
KAKerby, 03/02/2010
- Re: [Market-farming] manures/GAP training, Ryan Platte, 03/02/2010
- Re: [Market-farming] manures/GAP training, KAKerby, 03/02/2010
-
Re: [Market-farming] manures/GAP training,
KAKerby, 03/03/2010
- Re: [Market-farming] manures/GAP training, Road's End Farm, 03/03/2010
-
Re: [Market-farming] manures/GAP training,
SaladG, 03/03/2010
- Re: [Market-farming] manures/GAP training, Road's End Farm, 03/03/2010
- Re: [Market-farming] manures/GAP training, sunnfarm, 03/03/2010
-
Re: [Market-farming] manures/GAP training,
KAKerby, 03/03/2010
- Re: [Market-farming] manures/GAP training, Road's End Farm, 03/03/2010
-
Re: [Market-farming] Worms and manure,
Celeste Illgner Havener, 03/04/2010
-
Re: [Market-farming] Worms and manure,
Todd Lister, 03/04/2010
- Re: [Market-farming] Worms and manure, Casey & Teena, 03/04/2010
-
Re: [Market-farming] Worms and manure,
Todd Lister, 03/04/2010
- Re: [Market-farming] manures/GAP training, clearviewfarm, 03/03/2010
-
Re: [Market-farming] manures/GAP training,
KAKerby, 03/03/2010
- Re: [Market-farming] manures/GAP training, Roots Farm & Karen Sutherland, 03/03/2010
- Re: [Market-farming] manures/GAP training, mamica5, 03/03/2010
- Re: [Market-farming] manures/GAP training, Road's End Farm, 03/03/2010
- Re: [Market-farming] manures/GAP training, Road's End Farm, 03/03/2010
-
Re: [Market-farming] manures/GAP training,
Roots Farm & Karen Sutherland, 03/04/2010
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