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Lab Testing Coordination and Contact Information

Details of How AR Lab Network Works

Laboratories nationwide work together to rapidly identify antibiotic resistance genes and germs that could cause hard-to-treat or potentially untreatable infections. Collaboration from the local to national levels results in more rapid response for detecting resistance


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Healthcare Labs

  • Establishes protocols that immediately notify the health department, healthcare provider, and infection control staff of unusual resistance.
  • Works with public health department to understand when and where to submit isolates or specimens. Benefits of submitting isolates include:
    • Obtaining resistance mechanism data for resistant germs.
    • Better outbreak detection for the hospital’s patient population.
  • Examples of isolates or specimens to send include:
    • Carbapenem-resistant Enterobacteriaceae (CRE),
    • Candida species most likely to develop resistance (e.g., C. glabrata and C. auris),
    • Germs with unusual resistance, and
    • CRE colonization during state outbreak investigations.
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Public Health Department Labs

  • Performs bacterial identification, susceptibility testing, molecular testing to characterize CRE and carbapenem-resistant Pseudomonas aeruginosa (CRPA).
  • Reports unusual resistance identified to regional labs and CDC.
  • Develops a plan to respond rapidly to unusual genes and germs when they first appear.
  • Coordinates with affected healthcare facilities, regional lab, and CDC for every case of unusual resistance, including:
    • Testing CRE to help track and stop spread, and
    • Performing whole Whole Genome Sequencing (WGS) of all Salmonella for faster identification and response to outbreaks.
  • Provides timely lab results and recommendations to affected health care facilities and providers. If the patient came from or was transferred to another facility, alert that facility.
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Regional Labs and National Tuberculosis Molecular Surveillance Center (National TB Center)

  • Detects existing and emerging types of antibiotic resistance, tracks emerging resistance more effectively, and generates stronger data to protect people and combat future resistance threats.
  • Performs Core Testing at every regional lab, while select labs provide Additional Testing to support nationwide needs. This testing complements other lab capacity supported by CDC in every state, five cities, and Puerto Rico.
  • Core Testing includes:
    • Molecular testing to detect colonization of CRE.
    • Fungal susceptibility of Candida species to identify emerging resistance.
    • Identification and colonization screening to detect and help prevent spread of C. auris.
    • Detection and characterization of emerging threats and concerning threats, like mcr-1 and carbapenem-resistant Acinetobacter, and ability to detect changes to known threats, like Methicillin-resistant Staphylococcus aureus (MRSA).
  • Additional Testing includes:
    • C. difficile special projects.
    • Enhanced detection of drug-resistant N. gonorrhoeae using antimicrobial susceptibility testing and WGS.
    • Antibiotic susceptibility and serotyping of multidrug-resistant S. pneumonia.
    • Perform WGS for all isolates of M. tuberculosis.
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  • CDC coordinates the AR Regional Lab and provides technical expertise.
  • Confirms testing of unusual isolates and does additional testing.
  • Develops and provides new lab tests and guidance so health departments can quickly identify new threats.
  • Supports prevention experts, programs, and training in every state, and provides recommendations for local prevention and response.
  • Collects, tracks, and monitors threats found from state and regional labs. Reports critical findings to international partners.
  • Identifies data gaps and trends in resistance.
  • Adds new panels to the AR Isolate Bank for drug and diagnostic test development.

Map of Regional Labs and Contact Information

Map of Regional Labs and Contact Information


Contact Information for AR Regional Labs

Tests included in Core Testing are outlined in the table above.

Tests included in Core Testing are outlined in the table above.
Region Location and Contact Information What is Tested


Minnesota Department of Health Public Health Core Testing
+ C. difficile
+ S. pneumoniae


Maryland Public Health Laboratory


 Core Testing
+ N. gonorrhoeae


Wisconsin State Laboratory of Hygiene


 Core Testing
+ S. pneumoniae 


Texas Department of State Health Services Laboratory

Core Testing
+ N. gonorrhoeae


Wadsworth Center Laboratories (Bacteria) (Candida)


Core Testing




Tennessee State Public Health Laboratory


Core Testing
+ N. gonorrhoeae


Washington State Public Health Laboratories

Core Testing
+ N. gonorrhoeae
National Tuberculosis Molecular Surveillance Center Michigan Department of Health and Human Services + M. tuberculosis

National Contact Information