As a farmer with a small family Farm i can tell you that this will not hurt the factory farms, but will push out the small farms from the market
Its what happens every time they try to regulate the factory farms

As on the topic of MRSA, it came from farm as well as from hospitals due to overuse of anti biotics and improper cleaning

And you should differentiate European food and American food there, because we have very different food quality standards and control organs