How many antibiotics go to animals?

Estimates commonly place around two-thirds to three-quarters of global antibiotic tonnage in animal agriculture.

Does buying antibiotic-free meat solve it?

It may support reduced antibiotic use, but label definitions vary and resistant bacteria can still occur on meat from animals raised without antibiotics.

Is avian influenza a risk to people?

Human infections are uncommon and range from asymptomatic or mild illness to severe, sometimes fatal disease. Viral changes and exposure to infected animals require continued monitoring.

Has any country reduced use successfully?

Yes — Denmark, the Netherlands and others cut farm antibiotic use substantially without collapsing production.

Does plant-based eating help?

It lowers demand for the systems that generate both resistance selection pressure and spillover opportunity.

All guidesPublic health8 min read

Antibiotic resistance and pandemic risk in animal agriculture

Most antibiotics sold worldwide go to farmed animals, and dense confinement is an efficient laboratory for novel pathogens. This is the public-health argument.

In short

Published estimates put most global antimicrobial sales by weight in food animals; uses include treatment, disease prevention and, where permitted, growth promotion.
Antimicrobial resistance is associated with millions of deaths annually and is projected to worsen.
Three of four emerging infectious diseases are zoonotic, and intensive poultry and pig systems are recognised amplification settings.
Highly pathogenic avian influenza has caused the culling of hundreds of millions of birds in recent years.

Key numbers

~70%

Estimated global antimicrobial sales by weight for food animals

Van Boeckel et al., Science, 2017

1.27 m

Deaths directly attributable to AMR in 2019

GRAM study, The Lancet

75%

Of emerging infectious diseases that are zoonotic

CDC

13.6 m

Poultry birds that died or were culled in February 2026

WOAH situation report 80

Why farms use so many antibiotics

In crowded systems, subtherapeutic antibiotics compensate for stress, injury and pathogen load, and they modestly increase growth rate. That routine, low-dose exposure is precisely the condition that selects for resistant bacteria, which then move via workers, manure, water and meat.

Resistance is measurable in the food chain

National surveillance programmes repeatedly find resistant Salmonella, Campylobacter and E. coli on retail meat, and colistin-resistance genes have spread internationally after agricultural use. Restrictions work: several European countries cut farm antibiotic use sharply with no productivity collapse, and resistance rates fell.

The EU banned antibiotic growth promoters in 2006; routine preventive group treatment was further restricted in 2022.
Denmark's 'yellow card' system reduced pig antibiotic use while maintaining output.
Resistance does not respect borders — trade and travel globalise the problem.

Pandemic risk is a design feature, not bad luck

Influenza reassortment thrives where large numbers of genetically similar animals live at high density with human contact. Pigs act as mixing vessels for avian and human strains; poultry barns amplify avian influenza. Recent H5N1 spillovers into mammals, including dairy cattle, illustrate how fast the risk landscape changes.

What reduces the risk

Surveillance, biosecurity, vaccination and responsible antimicrobial use help reduce risk. Lower demand may reduce the number of animals farmed, but outbreak risk also depends on husbandry, wildlife contact and disease control.

The data

Global bacterial AMR deaths: 2021 estimates and 2050 forecasts

Attributable, 20211.14 million
Associated, 20214.71 million
Attributable, 20501.91 million · reference forecast

At a glance

Policy responses and measured effects

Measure	Where	Effect
Ban on growth-promoting antibiotics	EU, 2006	Large drop in use; resistance declines
Yellow card scheme	Denmark	Pig antibiotic use cut, output maintained
Veterinary prescription-only rules	Multiple	Reduced non-therapeutic use
Density and welfare standards	EU, UK	Lower disease pressure
Demand reduction	Consumer-led	Shrinks the exposed population

Common objections

ClaimCooking meat properly makes resistance irrelevant.

What the evidence showsCooking kills bacteria on that portion but does not stop resistance spreading through workers, manure, water and cross-contamination.

ClaimFarm antibiotics are all veterinary treatment.

What the evidence showsA large share historically went to whole-group prophylaxis and growth promotion, which is what regulators have targeted.

ClaimPandemics come from wild animals, not farms.

What the evidence showsBoth matter. Intensive poultry and pig systems are documented amplifiers, and recent H5N1 spread has moved through farmed species.

Questions people ask

How many antibiotics go to animals?: Estimates commonly place around two-thirds to three-quarters of global antibiotic tonnage in animal agriculture.
Does buying antibiotic-free meat solve it?: It may support reduced antibiotic use, but label definitions vary and resistant bacteria can still occur on meat from animals raised without antibiotics.
Is avian influenza a risk to people?: Human infections are uncommon and range from asymptomatic or mild illness to severe, sometimes fatal disease. Viral changes and exposure to infected animals require continued monitoring.
Has any country reduced use successfully?: Yes — Denmark, the Netherlands and others cut farm antibiotic use substantially without collapsing production.
Does plant-based eating help?: It lowers demand for the systems that generate both resistance selection pressure and spillover opportunity.