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Important Holiday Shipping Schedule Update


ATCC will be closed Wednesday, December 24, 2025 to Thursday, January 1, 2026. Please be advised  you can still submit orders for products during this time, but shipping will resume on Friday, January 2, 2026.


To ensure shipping before the ATCC holiday closing period, please reference the shipping schedule below:


  • Last shipping day for Domestic orders is Friday, December 19, 2025 (Room temperature items shipping only as no frozen item shipments on Fridays. Frozen/ dry ice shipments resumes January 2, 2026).

  • Last shipping day for International orders is Friday, December 12, 2025.

  • Shipping resumes January 2, 2026 for orders submitted after December 19, 2025.

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Drug Resistance

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Drug resistance continues to emerge globally

Your Trusted Source for Antimicrobial-Resistant Reference Microorganisms

To support the scientific community in combating antimicrobial resistance (AMR), ATCC offers a comprehensive and expanding collection of clinically relevant, drug-resistant strains. These strains are backed by source information, genotypic data, and susceptibility profiles, providing essential tools that support the global effort to combat superbugs and emerging resistance mechanisms. 

  • Develop and validate rapid diagnostic assays
  • Screen and evaluate novel antibiotics and therapeutic agents
  • Enhance sterility assurance protocols
  • Advance resistance mechanism research

Whether you're working on hospital-acquired infections, emerging superbugs, or global surveillance initiatives, ATCC provides the critical biological materials needed to accelerate your research and innovation.

Explore the portfolio  Learn more about AMR  Contact us

Watch our webinar to learn more about AMR

Antimicrobial Resistance: A Growing Global Crisis

Petri_Dish.jpgAntimicrobial resistance (AMR) is one of the most urgent public health threats of our time. According to the Centers for Disease Control and Prevention (CDC), more than 1.27 million people die annually as a direct result of drug-resistant infections, with nearly 5 million deaths associated with AMR globally. If current trends continue, up to 10 million deaths could be lost annually by 2050 due to antibiotic-resistant infections (de Kraker MEA, et al.). The rise of multidrug-resistant organisms poses a serious challenge to modern medicine.

Despite ongoing efforts to develop new antibiotics and strengthen antimicrobial stewardship, novel resistance mechanisms are emerging at an alarming pace. In this evolving landscape, early detection and access to well-characterized microbial strains are more critical than ever. As a trusted global resource, ATCC provides authenticated antimicrobial-resistant strains, enabling researchers to accelerate the development of diagnostics, therapeutics, and surveillance tools that combat the growing threat of drug resistance.

Explore our featured AMR resources

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Priority Antimicrobial-Resistant Strains

ATCC provides a robust portfolio of globally sourced multidrug-resistant (MDR) clinical isolates. Each strain is supported by comprehensive source metadata, phenotypic characterization, and genomic validation, providing essential tools that support the global effort to combat superbugs and emerging resistance mechanisms.

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Microbiology, bacterial culture plates Poster

Phenotypic and Genotypic Characterization of Antimicrobial-Resistant (AMR) Strains from the ATCC® Collection: A Key Resource for Diagnostics and Therapeutic Development

This is a poster presented at ASM Microbe 2025 that showcases the extensive characterization of 100 antimicrobial-resistant priority pathogens.

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WHO Releases Priority Fungal Pathogens List

WHO released a fungal priority pathogen list to strengthen the global response to fungal pathogens.

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