[CholeraJoe]

100 acres of lettuce or green onions in California contaminated with Salmonella and shipped to China Marts throughout the country would do it.

[1rudeboy]

No, it wouldn't. You'd have to have a significant number of illegal Mexicans doing nothing but pooping to cause that sort of an impact.

That's the problem with the "illegal pooping in the fields" canard: the scale of the outbreak indicates a systemic problem somewhere along the chain. It would be more accurate to claim that Mexicans are pooping into our distribution equipment. (Just that the image of a Mexican pooping into a piece of equipment doesn't garner the same emotional reaction).