Recent decades have witnessed an ever increasing rate of antibiotic-resistant infections across the globe. Many microbiologists attribute this to the usage of antibiotics among livestock, leading to the FDA to tighten restrictions for the administration of such drugs to animals. The restrictions apply to the antibiotic class cephalosporins, which are among the most commonly prescribed for children and those undergoing surgery, and used to treat other infectious illnesses such as strep throat, pneumoia, and urinary tract infections.
See the article “Citing Drug Resistance, U.S. Restricts More Antibiotics for Livestock” from the New York Times for more details.