Antibiotic resistance is a looming public health concern expected to kill up to 10 million people annually by 2050. Now, in the latest worrying development in the United States, Ohio State University researchers have found a bacteria resistant to last resort antibiotics, called carbapenems, on a pig farm that is barred from using them. The pig farm followed what the researchers describe as "typical US production practices" by giving their animals the antibiotic ceftiofur.