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At a glance
The National Antimicrobial Resistance Monitoring System (NARMS) is a U.S. public health surveillance system that tracks antimicrobial resistance in foodborne and other enteric bacteria.
- It collects information about enteric bacteria from people, retail meats and food animals.
- It shows emerging resistance, how resistance spreads, and how resistant and susceptible infections differ.
- Measuring resistance in bacteria from people helps us understand and prevent the spread of resistant infections.
Three agencies, three sources
NARMS is a partnership of CDC, the Food and Drug Administration (FDA), the U.S. Department of Agriculture (USDA) and state and local health departments.
| Agency | Source | What it tests |
|---|---|---|
| CDC | people | resistance in human isolates of Salmonella, Campylobacter, Shigella, E. coli O157 and Vibrio (other than V. cholerae) — and in isolates from multistate outbreaks caused by Salmonella, Shigella and E. coli |
| FDA | retail meat and seafood | serotyping, resistance testing and/or genetic analysis of Salmonella, Campylobacter, Enterococcus and E. coli from chicken, ground turkey, ground beef, pork chops, shrimp, tilapia and salmon |
| USDA | food animals | similar tests on the same four bacteria from samples collected at federally inspected slaughter and processing plants across the country |
More: partners in NARMS, CDC's role and a glossary of resistance terms.
How investigators use it
Public health officials use NARMS data to:
- detect emerging resistance trends;
- link enteric illnesses, resistant and susceptible, to specific sources and risk factors;
- understand the genetic mechanisms of resistance and how it spreads among enteric bacteria;
- help investigate outbreaks of enteric disease, including multistate foodborne outbreaks;
- educate consumers about resistance threats in food and the food safety practices that protect against them;
- guide public health priorities;
- promote the judicious use of antimicrobial drugs.
Why it matters
- Use breeds resistance: using antimicrobials in people and animals can lead to resistance in bacteria that cause human infections.
- Resistance spreads: resistant bacteria multiply and spread, and can pass their resistance to other kinds of bacteria, creating new resistant strains.
- Severe illness needs drugs that work: most enteric infections clear up on their own, but antimicrobials are essential for severe illness — and when the bacteria resist them, illness may last longer or be more severe.
- Data drive action: measuring resistance in bacteria from people, foods and food animals is central to preventing resistant infections, and NARMS data shape the interventions and policies that protect people.
What's ahead
Antimicrobial resistance remains a serious and evolving threat. The NARMS Strategic Plan for 2026–2030 sets out closer coordination across agencies, stronger partnerships and better data-sharing tools to meet it.
Sources
Based on "About the National Antimicrobial Resistance Monitoring System (NARMS)," Centers for Disease Control and Prevention; a work of the United States government in the public domain. Its stock photograph is not reproduced.
Licenza: CC0 1.0 (pubblico dominio) · Tratto da www.cdc.gov
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