You Should Not Have to Wonder if Your Food is Safe! - Weekly I receive notices of product recalls from the USDA. Here is an example:
JBS Tolleson, Inc., a Tolleson, Ariz. establishment, is recalling approximately 12,093,271 pounds of non-intact raw beef products that may be contaminated with Salmonella Newport.
Dr. Mercola explains Why Contamination Affects Such Large Amounts of Meat
"The answer is quite simple. While many think of a pack of ground beef as being the meat from an individual cow, it's actually an amalgam of meat from many different cows — a single fast food hamburger can contain meat from more than 1,000 animals,6 and all you need is one sick animal to contaminate nearly unlimited amounts of meat as it all runs through the same processing equipment and gets mixed together in gigantic batches.