A new framework paper in Frontiers proposes a unified classification system that aligns the World Health Organization's Anatomical Therapeutic Chemical (ATC) drug codes with the parallel ATCvet system used for veterinary medicines, giving researchers a single comparable taxonomy for tracking antibiotic use across humans, companion animals, and livestock.

The work, titled "Unified framework for human and veterinary antibiotics: mapping international drug classifications (ATC and ATCvet) to support antimicrobial resistance research," targets a structural gap in antimicrobial resistance (AMR) surveillance. Identical active ingredients sit under different codes in the two systems, and that mismatch complicates pooled analyses of consumption and resistance data drawn from hospitals, veterinary clinics, and farm-level records.

Why does a single code matter for AMR surveillance?

AMR research depends on combining datasets that describe who took which drug, at what dose, and where resistance emerged. When coders file the same molecule under distinct ATC and ATCvet codes, cross-sector studies require manual reconciliation that risks coding errors and missing data. A harmonized mapping closes that gap and lets investigators ask questions that cross the clinic-and-barn boundary, such as whether resistance patterns in a regional human hospital track antimicrobial use on nearby dairy operations.

What does the framework deliver?

The paper presents a methodology-focused mapping between ATC and ATCvet designed to support AMR research. By aligning the two systems, the framework enables automated translation of veterinary dispensing and resistance data into the same code space used for human surveillance, reducing the analytic friction that has historically separated one-health epidemiology from routine clinical reporting.

What changes for the practicing veterinarian?

Day-to-day clinical workflow is unlikely to change. Practitioners will continue to record drugs and doses as they do now, and existing veterinary formularies built around ATCvet will remain the operative reference inside practice management software. The payoff is upstream, in the research and surveillance outputs that veterinarians, public-health agencies, and antimicrobial stewardship programs use to set prescribing benchmarks and shape policy. Cleaner pooled data also strengthens the evidence base for species-specific susceptibility breakpoints, which feed back into hospital antibiograms and clinic-level treatment choices in both companion-animal and food-animal practice.

How does this fit the regulatory landscape?

Regulators in the United States and Europe already collect and publish antimicrobial sales and use data under their own taxonomies. The U.S. Food and Drug Administration's Center for Veterinary Medicine tracks drug sales and co-sponsors the National Antimicrobial Resistance Monitoring System, while the European Medicines Agency reports harmonized sales data across European Union member states. The U.S. Department of Agriculture's Animal and Plant Health Inspection Service adds on-farm surveillance layers. A unified ATC-to-ATCvet mapping provides a translation layer that can sit between national reporting systems and the comparative analyses that agencies and the WHO already run, without requiring either side to abandon its native classification.

What comes next?

The framework's value will hinge on adoption: uptake by national surveillance programs, inclusion in veterinary electronic health record standards, and integration with the WHO's existing ATC tooling will determine whether the paper becomes a one-off reference or a working standard for one-health AMR research. Watch for follow-on work that tests the mapping against real-world dispensing datasets from companion-animal hospitals and food-animal production systems.