CDC

Isolates Currently Available

The purpose of this bacterial bank is to provide panels of resistant bacteria, which can be used to challenge diagnostic devices and new antibiotic agents. These panels are assembled by Centers for Disease Control and Prevention (CDC) in collaboration with the Food and Drug Administration (FDA).

To use this page, click on the panel name to see a panel description and expand the list of available isolates.  The chart provides basic information about each isolate such as species, susceptibility information, key resistance determinants, and sequencing information.  Click on the PDF for each isolate to see the minimum inhibitory concentration (MIC) data, and propagation instructions.  You can also use the MS Excel file, located at the bottom of each panel list, to compare isolates and search through data.  Note that although some isolates may appear identical on the chart, more detailed data available in the PDF and Excel files will help to differentiate each.

Isolates available as of 10/10/2017

* Please Note:

MIC results for each antimicrobial agent for an isolate may commonly be ± 1 log2 (doubling dilution) different than what is posted on the FDA-CDC AR Bank website because this is the normal technical variability of antimicrobial susceptibility testing (see J. H. Jorgensen. 1993. J Clin Microbiol. Vol 31[11]: 2841-2844). MICs obtained by a user could possibly show an even greater difference than this, depending on the methodology, the modal MIC of the isolate, and if the MIC on the website is at a very low or very high testing range. However, major (resistant versus susceptible) or very major (susceptible versus resistant) interpretive category difference for a given drug-organism result should be uncommon (i.e., this could occur in the rare occasions where the susceptible and resistant breakpoints are within a single doubling dilution). In other cases a major or very major error likely indicates a problem with either the organism (e.g., losing a resistance mechanism upon passage) or the testing method being applied. The MIC results provided for each isolate were generated using frozen broth microdilution panels unless otherwise specified.

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