The U.S. Department of Agri­culture (USDA), along with the Nat­ional Pork Producers Council (NPPC), last week sharply criticized new guidelines by the World Health Organization (WHO) on the use of antibiotics in food animal production. The rules, the agency and livestock group said, would have no positive effect on human health and would jeopardize livestock health by tying the hands of farmers and veterinarians caring...