The Union of Concerned Scientists estimates that as much as 70% of all the antimicrobials produced in the U.S. are given to food animals. Millions of pounds of antimicrobials are administered each year at low doses to these animals, usually in their feed. So it’s not surprising that we’re finding antimicrobial resistant bugs like MRSA, better known as the flesh-eating bacteria, or resistant forms of Campylobacter, E. coli and Salmonella on the meats that we buy in the grocery store and floating around in the environment. Big Ag advocates claim that the proposed ban is going to backfire and we’ll end up with even more sick food animals and force farmers to treat them with antibiotics anyway. Many, like Congressman Leonard Boswell (D-IA) point to examples in Denmark, where a ban enacted more than a decade ago initially increased the mortality of piglets and the need to treat them with antibiotics. But as Robert Martin, former executive director for the Pew Commission on Industrial Farm Animal Production, testified, what the industry seems to ignore (or doesn’t want the public to know) is that once Danish hog farmers improved their production practices, “including better ventilation in the barns, more space provided for the animals, and more frequent cleaning of the barns,” the mortality rates quickly declined to pre-ban numbers.
Two Danish scientists, Dr. Frank Møller Aarestrup and Dr. Henrik Wegener, from the National Food Institute at the Technical University of Denmark submitted written testimony to the Rules Committee in effort to “set the record straight.” Drs. Aarstrup and Henrick said “representatives of organizations funded by U.S. agri-business have criticized and mis-represented the facts on the Danish ban of antibiotics since its inception.” In fact, according to their soon to be published study on the “Danish experience,” over the long-term, significantly reducing the use of antimicrobials actually increased swine productivity.
Lawmakers, like Senator Ted Kennedy (D-MA) and Congresswoman Slaughter have been introducing forms of PAMTA for almost a decade now. From the beginning, organizations like the American Public Health Association, American Medical Association, Consumers Union and the Center for Science in the Public Interest recognized the need to restrict the constant low dosage use of antibiotics in agriculture. Each year, provisions in the legislation varied, but each version proposed banning the use of antibiotics important to human health from being used in food animals and to restrict the use of other antibiotics.
While many health advocates applaud lawmakers for introducing PAMTA, there are some who believe the legislation should be stronger. Martin was invited to Monday’s hearing to present the Pew Commission’s findings and recommendations on how to tackle the antibiotic resistance threat posed by animal agriculture. The Commission goes a few steps further than PAMTA. Rather than limiting the ban to the 7 classes of antibiotics important to human health, the Commission recommended a ban on the non-therapeutic use of all antibiotics and other antimicrobials, like ionophores, that have the potential to lead to the increase of antimicrobial resistant bacteria in the environment. Ionophores are made up of organic compounds that have antibiotic properties. Instead of using fungus based antibiotics ionophores are commonly added to feed to kill single-cell parasites that infest the intestinal tracts of animals. You might remember Tyson Foods got into a little hot water a few years ago for labeling its chicken antibiotic-free despite the fact it was still treating its birds with ionophores. While the use of ionophores continues to add to the ever-increasing “reservoir of antimicrobial resistance,” the USDA says the use of the compounds, “…does not necessarily lead to other types of antibiotic resistance.” What led scientists to couch their conclusion was that they did find that the use could lead to resistance in bacitracin, which is commonly found in antibiotic ointments, like Neosporin, used to treat skin and eye infections.
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