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ETEST®

Actionable Antimicrobial Susceptibility Testing
for New Drugs

ETEST complements the bioMérieux total microbiology solution by providing a manual AST method for testing newer antimicrobials shortly after FDA clearance. 

Product Overview

ETEST is a simple manual antimicrobial susceptibility test (AST) that has helped laboratories for over 30 years in delivering precise minimum inhibitory concentration (MIC) values. Each test helps guide appropriate therapy by providing results that inform the need for escalation, de-escalation, or discontinuation of empiric therapy.

These tests are particularly helpful in determining choice and dosage of antimicrobials in patients with sterile site infections (i.e., endocarditis), severe nosocomial infections, chronic infections (i.e., cystic fibrosis) and immunosuppressed patients.

ETEST offers:

  • The latest antimicrobials with a flexible system
  • Precise MIC for non-fastidious and fastidious organisms
  • Testing for more than 90 antimicrobial agents, including resistance detection references

Four Simple Steps and Easy Interpretation*

Graphic showing steps to interpret results

*Refer to drug/bug specific package


Newest Additions to the ETEST Portfolio

Test Name

 Test Description

ETEST® Gepotidacin (GEP)Gepotidacin is a first-in-class oral antibiotic indicated for the treatment of uncomplicated urinary tract infections (uUTIs) and uncomplicated gonorrhea in appropriate clinical settings. Testing with ETEST® Gepotidacin (GEP) (0.016–256 µg/mL) is indicated for Enterobacterales, Staphylococcus saprophyticus, Enterococcus faecalis, and Neisseria gonorrhoeae as recognized by the FDA Susceptibility Test Interpretive Criteria (STIC), with demonstrated acceptable performance for Escherichia coli, Staphylococcus saprophyticus, Enterococcus faecalis, and Neisseria gonorrhoeae.

ETEST® Aztreonam/Avibactam (AZA)

ETEST® Aztreonam/Avibactam (AZA) is indicated for testing FDA-recognized Enterobacterales organisms, including Escherichia coli, Klebsiella pneumoniae, Klebsiella aerogenes, Enterobacter cloacae complex, Citrobacter spp., Proteus spp., Morganella morganii, Providencia stuartii, and Serratia marcescens.

Featured Tests 

ETEST® Gepotidacin (GEP)
(GEP) (0.016–256 µg/mL)

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ETEST® Ceftolozane/Tazobactam 
(CT 0.016 - 256 µg/mL)

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ETEST® AZA (Aztreonam/Avibactam)
Aztreonam 0.016–256 µg/mL with a
fixed concentration of 4 µg/mL avibactam

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ETEST® Eravacycline 
(PT 0.002 - 32 µg/mL)


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ETEST® Piperacillin/Tazobactam 
(PT 0.016/4 - 256/4 µg/mL)

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ETEST® Meropenem/vaborbactam
(MEV 0.004/8-64/8 µg/mL)

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ETEST® Telavancin
(TLA 0.002-32 µg/mL)

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ETEST® Plazomicin
(PLZ 0.016 - 256 µg/mL)

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AST Powered By ETEST Gradient Technology

AST Powered By ETEST Gradient Technology


Technical Specifications


Packaging Options

ETEST Strips are available to purchase in two different packaging options, allowing laboratories to order what fits their specific needs.

ETEST Single Pack

Single Packs

Single packs contain one strip per package. The packaging is easy to open with one hand and a desiccant within each pack ensures stability. Available in 30 single packs. 

ETEST Multipack

Multi-Pack

Strips are contained in cartridges which hold 10 strips. There are 10 cartridges per box for a total of 100 strips. There is an integrated desiccant in each cartridge and each box comes with a re-sealable lid for enhanced storage stability. This packaging is compatible with the SIMPLEX 76™ and the NEMA 88™

ETEST Multi-Pack Handling and Storage 


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Additional Resources