The rise of dangerous antibiotic-resistant bacteria is a public health crisis, and routine antibiotic misuse in industrial agriculture is part of the problem.
Since the 1940s, antibiotics have saved millions of lives and played a critical role in protecting public health. However, many of the antibiotics we rely on to cure disease in humans are also used on concentrated animal feeding operations (CAFOs), or factory farms, to prevent disease in overcrowded conditions. This dangerous misuse of antibiotics in agriculture is partially responsible for the emergence of drug-resistant bacteria that pose a grave threat to public health.
Scientists, public health advocates, and consumers are pushing to end the inappropriate use of medically important antibiotics in livestock production, and while antibiotic use has recently declined in the United States, dangerous misuse is still a serious problem.2 However, while most of the bacteria on and in our bodies actually help keep us healthy, some cause serious illnesses and death.
Since the discovery of the first antibiotic, penicillin, in the early twentieth century antibiotics have been used to cure a wide range of bacterial diseases including Lyme disease, syphilis, tuberculosis and a wide range of other infections. Antibiotics, such as penicillin, tetracycline and amoxicillin kill or inhibit the growth of bacteria without causing significant harm to people.
Misuse of antibiotics, however, leads to the evolution of antibiotic-resistant bacteria. When bacteria are continually exposed to low doses of an antibiotic, those resistant to the drug survive and reproduce while the rest die off, resulting in a new bacteria population that resists the antibiotic.7
As a result, infections from resistant bacteria are both increasingly common and more difficult to treat. The Centers for Disease Control (CDC) estimates that each year in the US, at least 2.8 million people acquire antibiotic-resistant bacterial infections and 35,000 people die as a direct result.8 Health care costs associated with antibiotic-resistant bacteria amount to about $20 billion each year in the US alone and amount to more than eight million extra patient days in the hospital.1819
Because of cramped conditions, poor sanitation, and antibiotic overuse, disease-causing bacteria are more likely to develop in industrial livestock facilities than in small or backyard livestock farms.21 Workers at these facilities often carry (unknowingly) antibiotic-resistant bacteria into the general public; as one example, MRSA, a now-common staph bacteria resistant to many antibiotics, has been found to persist in the nasal passages of workers at industrial hog operations, even following extended periods away from these facilities. 2627 Manure lagoons can also overflow or burst during natural disasters, like they did during Hurricane Florence in 2018, which adds an additional threat to health and safety when clean water and medical access are already limited.28
With huge quantities of manure routinely sprayed onto fields surrounding CAFOs, both antibiotics and antibiotic-resistant bacteria can leach into surface and groundwater, contaminating drinking wells and endangering the health of people living close to large livestock facilities.36 In particular:
While the FDA announced a five-year plan to tackle these remaining concerns in 2019, some critics suggest the time frames should be accelerated to account for the urgent threat antibiotic resistance poses.38
Representative Louise Slaughter (D-NY), the only microbiologist in Congress, has introduced the Preservation of Antibiotics for Medical Treatment Act (PAMTA) several times in the House of Representatives, most recently in the 2015-2016 session.39 First introduced in 1999, the bill would phase out the non-therapeutic use of eight classes of medically important antibiotics and restrict the use of many other antibiotics in animal feed, while allowing the use of these drugs for treating sick animals. The prior time it was introduced, the bill had 78 Congressional cosponsors and was endorsed by 450 health, farming, food safety, religious, labor and consumer advocate groups. Fifty cities around the country have passed resolutions encouraging the passage of PAMTA and its Senate corollary, the Prevention of Antibiotic Resistance Act. Nonetheless, the bills have never made it out of committee.40
In 2015, United Nations member states approved a World Health Organization plan to address antibiotic resistance, calling on countries to draw up action plans within two years.44 A recent study shows that banning GPAs in Denmark led to little more than a one percent drop in production of pork and only a slight rise in poultry production, which was offset in part by eliminating GPA costs; a ban in the US would likely produce similar results.45 Given these negligible impacts to the industry and the potentially catastrophic human and economic costs of a “post-antibiotic” world, it is imperative that governments and industry take swift action to curtail the overuse of these critical drugs.
Responsible livestock production doesn’t have to completely exclude antibiotics — they are still vital tools for treating sick animals that need to be used carefully. Farmers who raise animals on pasture with sustainable practices do not use antibiotics for growth promotion or other non-therapeutic reasons. In part, they rely less on drugs because the animals are raised in cleaner environments than those of confinement operations, with less stress and the ability to express natural behaviors, and thus are less prone to sickness. Generally, these farms use antibiotics only to treat acute infections in sick animals, just as they are used to treat human illness.
Animal Welfare Approved, a label certifying high animal welfare standards on livestock farms, includes standards for antibiotic use:
While USDA organic standards prohibit antibiotic use in animals raised organically, they also mandate that sick animals must be treated; if a sick animal is given antibiotics to treat infection, its meat or other products cannot be sold as organic, so these animals must be sold off to conventional producers after treatment.
You can help curb the systemic spread of antibiotic-resistant bacteria by supporting meat and poultry that has been raised without non-therapeutic antibiotics:
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