The bill would ban from use in livestock and poultry animal health products that are used to prevent and control diseases. Farmers only would be allowed to use animal health products that treat diseases.
The bill also would require all ‘critical antimicrobial animal drugs’ to go through a second US Food and Drug Administration (FDA) approval process within two years of enactment of the legislation. Currently to win approval, an animal drug maker must demonstrate that a product is effective and safe for animals and for the environment. FDA also must determine that new antibiotics for food animals will not harm human health.
In the European Union, antibiotics for preventive use in livestock production, have been forbidden since January 1, 2006.
http://www.meatinternational.com/news/no-antibiotics-amendment-us-pig-industry-id1667.html