Antimicrobial Resistance: From Farm to Fork

Antimicrobials, including antibiotics, are arguably one of humanity's greatest modern inventions, saving millions of human and animal lives every year. But much of that success story is now under threat, and a surprising amount of the problem does not start in hospitals, but on farms and in our food system. That threat is antimicrobial resistance, or AMR.

AMR happens when the germs antimicrobials are meant to kill evolve to survive them instead. Once that happens, infections that used to be simple to treat can become deadly. It is estimated to be directly responsible for over a million deaths worldwide each year, and linked to nearly 5 million more.

Photo by Olena Somak_ua on Unsplash

A huge share of the world's antimicrobials are used in food production.

Antimicrobials are routinely given to livestock, poultry, and farmed fish, sometimes to treat illness, but often simply to prevent disease or speed up growth in crowded farming conditions. Microorganisms are evolution machines, and excessive antimicrobial use gives them the opportunity to grow immune to them in just a few generations.

Resistant bacteria do not just affect animals; they have a direct effect on humans too. This can be through the meat, dairy, and eggs we eat, through water and soil contaminated by farm waste run-off, and through direct contact between animals, farm workers, and the wider environment. By the time food reaches your plate, it can carry bacteria that no longer respond to the antimicrobials we rely on to treat infections.

There have been real breakthroughs in the fight against AMR, including in food and agriculture, from rapid diagnostic tools that help farmers identify infections without defaulting to antimicrobials, to phage therapy (using viruses that target harmful bacteria instead of drugs), CRISPR-Cas gene editing, and engineered antimicrobial peptides that offer alternatives to traditional treatments.

But here's the encouraging truth: AMR in the food system is highly preventable. Here's what can be done.

1. Rethink How Antimicrobials Are Used on Farms

In livestock systems, including poultry, ruminant, and aquaculture farming, antimicrobials should never be used routinely, as a growth booster, or as a substitute for good animal care. They should only be administered under the guidance of a veterinary professional, and only when genuinely needed.

The same discipline applies to us as consumers and patients: when we're sick, we should always consult a health professional before taking any antimicrobial, rather than self-medicating or stopping treatment early. Every unnecessary dose, whether on a farm or in a household, adds pressure that helps resistant bacteria thrive.

2. Improve Hygiene Across the Food Chain

Farmers often reach for antimicrobials the moment an animal falls sick or a crop shows signs of disease. But many of these issues can be prevented in the first place through strong biosafety and hygiene practices on farms. Clean water, proper waste management, and adequate space for livestock all reduce the disease pressure that drives antimicrobial use.

Food safety matters at every step from farm to fork. Keeping food clean, properly cooked, chilled, or dried helps prevent the foodborne illnesses that create demand for antimicrobials in the first place. During food preparation, keep dried foods away from moist ones to avoid cross-contamination, clean different food items separately, and wash utensils thoroughly after each use. These small habits ultimately reduce the need for antimicrobial intervention down the line.

3. Create Awareness Across the Food Chain

Many people still have no idea that their food choices fuel AMR. Awareness needs to reach everyone involved, including farmers deciding whether an animal truly needs treatment, food handlers preventing contamination, and households making everyday food safety choices at home.

The issue of AMR is not an abstract health challenge confined to hospitals. It is in the manner we produce, process and consume food. Protecting the power of antimicrobials starts with the entire food system by using them responsibly and under an expert's guidance.