http://blogs.alternet.org/speakeasy/2010/05/14/food-unsafety-update-e-coli-0145-in-arizona-lettuce-and-more/

Thank you for this, Alternet. How about one more potential reason?

The possibility of migrant, illegal aliens relieving themselves in the lettuce fields - people who have no regard for personal hygiene.

That happens.

And isn't this interesting that this comes on the heels of Gov. Jan Brewer's new legislation targeting illegals?

I think this is more than coincidental.

Just another way to force Arizona to bend to the feds, even though she had a right to save her people from the incursion of illegals.