Studies have shown that when contaminated meat is recalled, only about half of it is actually recovered- the rest remains in grocery stores. You can protect yourself and your loved ones from E. coli, campylobacter, listeria, and other bacteria that live in the intestinal tracts and feces of animals by always leaving meat and other animal products at the grocery store. Most farmed animals are crammed into filthy sheds and slaughtered on killing floors that are contaminated with feces, vomit, and other bodily fluids. These unsanitary conditions have led to a rise in food borne bacteria.
Plant-based foods, on the other hand, don't normally harbor E. coli or other fecal bacteria. In fact, according to the USDA, 70 percent of food poisoning is caused by contaminated animal flesh. When fruits or vegetables do become contaminated with E. coli, it is because animal manure was used to fertilize crops or leaked into waterways. Cross-contamination can also occur when fruits and vegetables are placed on the same surface as meat... http://examiner.gmnews.com/news/2007/1004/letters/033.html