The findings appeared this week in the Proceedings of the National Academy of Science. One way the antibiotic-resistant microbes can enter the food supply is through water — by way of runoff from the farm. Researchers say as a result, this a global issue, not just a local one.
In 2011, the Food and Drug Administration put the responsibility on pharmaceutical companies to voluntarily reduce sales of antibiotics to farmers. Last year, however, sales of penicillins and tetracyclines for animal use doubled from previous years.