AST Method Verification Isolates for New Agents

These isolate sets are available to clinical laboratories for the purpose of antimicrobial susceptibility testing verification, according to recommended guidance1.  Each isolate was tested multiple times, according to CLSI broth microdilution and disk diffusion (for some agents) methods2,3.  Data summaries, including modal values and categorical results, are provided with each isolate set4,5.

To request isolates download the

request form, complete the form and

either fax to 440-835-5786, email to

or contact us by phone at 440-835-4458


Isolates will be shipped using materials that conform to IATA regulations for shipping UN3373, Category B, biological substances



  1. Clinical and Laboratory Standards Institute. Verification of Commercial Microbial Identification and Antimicrobial Susceptibility Testing Systems.  Approved Standard 1st Edition. CLSI M52-E1.  Wayne, PA: CLSI; August 2015.
  2. Clinical and Laboratory Standards Institute, Methods for Dilution Antimicrobial Susceptibility Tests for Bacteria that Grow Aerobically; Approved Standard- 12th Edition. CLSI document M07-A12.  Wayne, PA: CLSI; 2024.
  3. Clinical and Laboratory Standards Institute, Performance Standards for Antimicrobial Disk Susceptibility Tests; Approved Standard- 14th Edition. CLSI document M02-A14.  Wayne, PA: CLSI; 2024.
  4. Clinical and Laboratory Standards Institute. Performance standards for antimicrobial susceptibility testing; Approved Standard – 34th Edition.  CLSI document M100-S34.  Wayne, PA: CLSI; 2024.