Originally Posted by Gourmet Greg
Yeah. To make ground meat they take all the bits and pieces that may have bacteria or other contaminants on the surface and grind it up thus mixing all the bacteria and contaminants throughout the inside of the ground meat. You could perhaps wash off or wipe off a steak but there's no way to get any contaminants out of ground meat, and IMO ground meat is much more likely to go bad more quickly.
And, also, thanks to commercial, large scale production, your 1 lb of ground meat could have flesh from up to 100 cows in it.