I agree with you on high density confinement livestock production. But is there evidence of antibiotic resistant strains in animals causing issues for humans?
Antibiotic Resistance from the Farm to the Table. September 11, 2014. Available at: http://www.cdc.gov/foodsafety/from-farm-to-table.html. Accessed September 14, 2015.
https://www.who.int/news/item/07-11-2017-stop-using-antibiot...
ANTIBIOTIC RESISTANCE—LINKING HUMAN AND ANIMAL HEALTH https://www.ncbi.nlm.nih.gov/books/NBK114485/
Much of modern medicine depends on antibiotics. The above resources give clear and compelling evidence that overuse of antibiotics in livestock is associated with increases in drug-resistant infections in humans.