I thought this was a great resource for anyone who eats meat and/or uses antibiotics. Currently, antibiotics are used at sub-therapeutic levels in livestock to assist in weight gain. This creates the perfect situation for evolution. Bacteria can easily develop resistance to these antibiotics which are also used to treat infections in humans. The waste from the livestock is spread on fields used to grow vegetables and if not properly washed the bacteria end up in a human unable to treat the infection with that/ or those antibiotics. These problems are becoming more and more common and the federal government is finally starting to pay attention but the big agri-industry is not going to change without a fight so its important to pressure your congressmen to eliminate the non-therapeutic use of antibiotics. This website is a good place to start.