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

DIG DEEPER

How Industrial Agriculture Affects Our Water

Bacteria on the Farm Do Not Stay on the Farm

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:

  • The VFD does not clearly define the terms of the veterinarian-client relationship and does not set strict limits on duration or refills of prescribed drugs, allowing for possible misuse of some drugs under the guise of disease prevention rather than actual limited use for treatment.
  • The FDA’s list of medically important drugs needs updating as new drugs become used in medicine as resistance evolves.
  • The restrictions on medically important antibiotics only account for drugs delivered in food and water, allowing for the continued over-the-counter sale of medically important drugs delivered by injection or other methods.37

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

Preservation of Antibiotics for Medical Treatment Act

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

World Health Organization Plan

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:

  • To help eliminate or reduce vulnerability to disease and the need for antibiotics at therapeutic levels, Animal Welfare Approved encourages the appropriate use of vaccines on an individual or group basis for the prevention of disease.
  • Any sick or injured animals on the farm must be treated immediately to minimize pain and distress. This must include veterinary treatment if required. Recommended Homeopathic, herbal or other non-antibiotic alternative treatments are preferred. If alternative treatments are not suitable or not effective or if a veterinarian has recommended antibiotic treatment, this must be administered.
  • Animals treated with an antibiotic must not be slaughtered or used to produce milk for the Animal Welfare Approved program before a period of time has passed that is at least twice the licensed withdrawal period of the antibiotic used.46

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.

Hide References

  1. Marshall, Bonnie and Levy, Stuart. “Food Animals and Antimicrobials: Impacts on Human Health.” Clinical Microbiology Reviews, 24(4): 717-733 (2011). Retrieved January 13, 2017, from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3194830/ 
  2. Sender, Ron et al. “Revised Estimates for the Number of Human and Bacteria Cells in the Body.” PLoS Biol 14:8 (2016). Retrieved January 13, 2017, from https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.1002533
  3. World Health Organization. “Antimicrobial resistance: Fact sheet.” WHO, February 15, 2018. Retrieved January 13, 2017, from https://www.who.int/mediacentre/factsheets/fs194/en/
  4. Mayo Clinic. “Antibiotics: Are you misusing them?” Mayo Clinic, 2014. Retrieved January 13, 2017, from https://www.mayoclinic.org/healthy-lifestyle/consumer-health/in-depth/antibiotics/art-20045720 
  5. Kohanski, Michael. “Sublethal antibiotic treatment leads to multidrug resistance via radical-induced mutagenesis.” Molecular Cell, 37(3), 311-320 (2010). Retrieved January 13, 2017, from https://www.sciencedirect.com/science/article/pii/S1097276510000286
  6. World Health Organization. “Antimicrobial resistance.” WHO, February 15, 2018. Retrieved April 19, 2019, from https://www.who.int/mediacentre/factsheets/fs194/en/
  7. Ventola, C Lee. “The Antibiotic Resistance Crisis: Part 1: Causes and Threats.” P & T: A Peer-reviewed Journal for Formulary Management 40.4 (2015): 277-83. Retrieved January 22, 2020, from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4378521/
  8. Centers for Disease Control and Prevention. “Antibiotic Resistance Threats in the United States.” CDC, 2013. Retrieved January 13, 2017, from https://www.cdc.gov/drugresistance/threat-report-2013/
  9. Centers for Disease Control and Prevention. “Antimicrobial Resistance Posing Growing Health Threat.” CDC, 2011. Retrieved January 13, 2017, from https://www.cdc.gov/media/releases/2011/p0407_antimicrobialresistance.html
  10. O’Neil, Jim. “Antimicrobial Resistance: Tackling a crisis for the health and wealth of nations.” The Review on Antimicrobial Resistance, December 2014. Retrieved January 13, 2017, from https://amr-review.org/sites/default/files/AMR%20Review%20Paper%20-%20Tackling%20a%20crisis%20for%20the%20health%20and%20wealth%20of%20nations_1.pdf
  11. Chan, Margaret. “World Health Day 2011: Combat drug resistance: no action today means no cure tomorrow.” World Health Organization, April 6, 2011. Retrieved January 13, 2017, from https://www.who.int/mediacentre/news/statements/2011/whd_20110407/en/index.html
  12. World Health Organization. “Antimicrobial resistance: global report on surveillance 2014.” WHO, April 2014. Retrieved January 13, 2017, from https://www.who.int/drugresistance/documents/surveillancereport/en/
  13. Center for Veterinary Medicine. “SUMMARY REPORT on Antimicrobials Sold or Distributed for Use in Food-Producing Animals. FDA Department of Health and Human Services, December 2015. Retrieved January 13, 2017, from https://www.fda.gov/downloads/ForIndustry/UserFees/AnimalDrugUserFeeActADUFA/UCM476258.pdf
  14. Dibner, JJ and Richards, JD. “Antibiotic Growth Promoters in Agriculture: History and Mode of Action.” Poultry Science, 84: 634–643. Retrieved January 13, 2017, from https://www.ars.usda.gov/alternativestoantibiotics/PDF/publications/12JJDibner.pdf
  15. US Department of Health and Human Services. “FDA Announces Implementation of GFI #213, Outlines Continuing Efforts to Address Antimicrobial Resistance.” US Food and Drug Administration, 2017. Retrieved May 31, 2018 from: https://www.fda.gov/AnimalVeterinary/NewsEvents/CVMUpdates/ucm535154.htm
  16. Van Boeckel, Thomas P. et al. “Global trends in antimicrobial use in food animals.” Proceedings of the National Academy of Sciences. vol. 112 no. 18: 5649-5654 (May 5, 2015). Retrieved January 13, 2017, from https://www.pnas.org/content/112/18/5649
  17. World Health Organization. “Antimicrobial resistance: global report on surveillance 2014.” WHO, April 2014. Retrieved January 13, 2017, from https://www.who.int/drugresistance/documents/surveillancereport/en/
  18. Jacobs, Andrew, and Michael Adno. “Citrus Farmers Facing Deadly Bacteria Turn to Antibiotics, Alarming Health Officials.” The New York Times, The New York Times, 18 May 2019. Retrieved 23 January, 2020 from www.nytimes.com/2019/05/17/health/antibiotics-oranges-florida.html.
  19. Jacobs, Andrew. “Spraying Antibiotics to Fight Citrus Scourge Doesn’t Help, Study Finds.” The New York Times, The New York Times, 16 Aug. 2019. Retrieved 23 January, 2020, from www.nytimes.com/2019/08/16/health/antibiotics-citrus-spraying.html
  20. Graham, Jay P. et al. “The Animal-Human Interface and Infectious Disease in Industrial Food Animal Production: Rethinking Biosecurity and Biocontainment.” Public Health Report, 123(3): 282–299 (May-June 2008). Retrieved January 13, 2017, from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2289982/
  21. Ibid.
  22. Nadimpalli, Maya et al. “Persistence of livestock-associated antibiotic-resistant Staphylococcus aureus among industrial hog operation workers in North Carolina over 14 days.” Occupational and Environmental Medicine, 72(2). Retrieved January 13, 2017, from https://oem.bmj.com/content/early/2014/09/05/oemed-2014-102095.full
  23. Graham, Jay P. et al. “The Animal-Human Interface and Infectious Disease in Industrial Food Animal Production: Rethinking Biosecurity and Biocontainment.” Public Health Report, 123(3): 282–299 (May-June 2008). Retrieved January 13, 2017, from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2289982/
  24. Food & Water Watch. “What’s Wrong With Factory Farms?” FWW, (n.d.). Retrieved December 6, 2016, from https://www.factoryfarmmap.org/problems/
  25. Graham, Jay P. et al. “The Animal-Human Interface and Infectious Disease in Industrial Food Animal Production: Rethinking Biosecurity and Biocontainment.” Public Health Report, 123(3): 282–299 (May-June 2008). Retrieved January 13, 2017, from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2289982/
  26. Ibid.
  27. Chee-Sanford, JC et al. “Fate and transport of antibiotic residues and antibiotic resistance genes following land application of manure waste.” Journal of Environmental Quality, 38(3), 1086-1089 (2009). Retrieved January 13, 2017, from https://www.ncbi.nlm.nih.gov/sites/entrez?Db=pubmed&Cmd=Retrieve&list_uids=19398507&dopt=abstractplus
  28. Biesecker, Michael, and Gary D. Robertson. “Hurricane Florence Breaches Manure Lagoon, Coal Ash Pit in North Carolina.” PBS, Public Broadcasting Service, 17 Sept. 2018. Retrieved 27 January, 2020, from www.pbs.org/newshour/nation/hurricane-florence-breaches-manure-lagoon-coal-ash-pit-in-north-carolina
  29. Hribar, Carrie. “Understanding Concentrated Animal Feeding Operations and Their Impact on Communities.” National Association of Local Boards of Health: Ohio, 2010. Retrieved January 13, 2017, from https://www.cdc.gov/nceh/ehs/docs/understanding_cafos_nalboh.pdf 
  30. McEachran, Andrew D., et al. “Antibiotics, Bacteria, and Antibiotic Resistance Genes: Aerial Transport from Cattle Feed Yards via Particulate Matter.” Environmental Health Perspectives (April 1, 2015). Retrieved January 13, 2017, from https://ehp.niehs.nih.gov/1408555/
  31. Ahmad, Aqeel, et al. “Insects in confined swine operations carry a large antibiotic-resistant and potentially virulent enterococcal community.” BioMed Central Microbiology 11:23 (2011). Retrieved January 13, 2017, from https://bmcmicrobiol.biomedcentral.com/articles/10.1186/1471-2180-11-23
  32. Nadimpalli, Maya. “Persistence of livestock-associated antibiotic-resistant Staphylococcus aureus among industrial hog operation workers in North Carolina over 14 days.” Occupational & Environmental Medicine, 72(2) (September 8, 2014). Retrieved May 31, 2018, from https://oem.bmj.com/content/early/2014/09/05/oemed-2014-102095.info
  33. Schulz, Jochen, et al. “Antimicrobial-Resistant Escherichia coli Survived in Dust Samples for More than 20 Years.” Frontiers in Microbiology, 7: 866 (2016). Retrieved January 13, 2017, from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4901058/
  34. Zurek, Ludek and Ghosh, Anuradha. “Insects Represent a Link between Food Animal Farms and the Urban Environment for Antibiotic Resistance Traits.” Applied Environmental Microbiology, 80(12): 3562-3567 (June 2014). Retrieved January 13, 2017, from https://aem.asm.org/content/80/12/3562.short
  35. Graham, JP, et al. “Antibiotic resistant enterococci and staphylococci isolated from flies collected near confined poultry feeding operations.” Science of the Total Environment, 407(8):2701-10 (April 1, 2009). Retrieved January 13, 2017, from https://www.ncbi.nlm.nih.gov/pubmed/19157515
  36. Antimicrobials Sold or Distributed for
    Use in Food-Producing Animals.” United States Food and Drug Administation, Center for Veterinary Medicine, December 2019. Retrieved 27 January, 2020, from https://www.fda.gov/media/133411/download
  37. Ibid.
  38. Hoelzer, Karin, and Daniel Feingold. “Highlights of FDA’s 5-Year Plan to Improve Antibiotic Use in Food Animals.” The Pew Charitable Trusts, 11 December, 2018. Retrieved 27 January, 2020 from www.pewtrusts.org/en/research-and-analysis/articles/2018/12/11/highlights-of-fdas-5-year-plan-to-improve-antibiotic-use-in-food-animals
  39. 116th Congress. “H.R.1552 – Preservation of Antibiotics for Medical Treatment Act of 2015.” Congress.gov, 2015-2016. Retrieved January 13, 2017, from https://www.congress.gov/bill/114th-congress/house-bill/1552/cosponsors?q=%7B%22search%22%3A%5B%22Preservation+Antibiotics+for+Medical+Treatment+Act%22%5D%7D
  40. Ibid.
  41. World Health Organization. “World Health Assembly addresses antimicrobial resistance, immunization gaps and malnutrition.” WHO, May 25, 2015. Retrieved January 13, 2017,  https://www.who.int/mediacentre/news/releases/2015/wha-25-may-2015/en/
  42. Boland, Jay P. et al. “Growth Promoting Antibiotics in Food Animal Production: An Economic Analysis.” Public Health Reports, 122(1), 79-87 (Jan-Feb 2007). Retrieved January 13, 2017, from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1804117/
  43. Teilant, Aude and Laxminarayan, Ramanan. “Economics of Antibiotic Use in U.S. Swine and Poultry Production.” Choices, 1st Quarter, 30(1), (2015), Agricultural & Applied Economics Association. Retrieved January 13, 2017, from https://www.choicesmagazine.org/UserFiles/file/cmsarticle_404.pdf
  44. Ibid.
  45. Ibid.
  46. Animal Welfare Approved. “Beef Cattle and Calves Standards.” A Greener World, (n.d.). Retrieved January 13, 2017, from https://animalwelfareapproved.us/standards/beef-cattle-2015/#30-health-management
  47. USDA Agricultural Marketing Service. “Organic Livestock Requirements.” USDA, July 2013. Retrieved January 15, 2017, from https://www.ams.usda.gov/publications/content/organic-livestock-requirements
  48. US Department of Agriculture. “Meat and Poultry Labeling Terms.” USDA, January 15. Retrieved April 19, 2019, from https://www.fsis.usda.gov/wps/portal/fsis/topics/food-safety-education/get-answers/food-safety-fact-sheets/food-labeling/meat-and-poultry-labeling-terms/