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Related Experiment Videos

The E-Test as an epidemiologic tool.

F Baquero1, R Cantón, J Martinez-Beltrán

  • 1Department of Microbiology, Hospital Ramón y Cajal, Madrid, Spain.

Diagnostic Microbiology and Infectious Disease
|July 1, 1992
PubMed
Summary

The E-Test effectively identifies bacterial strains with extended-spectrum beta-lactamases, outperforming traditional methods. This makes it a superior tool for detecting resistant strains and aiding in epidemiologic surveillance.

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Area of Science:

  • Microbiology
  • Antimicrobial Resistance

Background:

  • Plasmid-mediated extended-spectrum beta-lactamases (ESBLs) are a significant cause of bacterial resistance.
  • Accurate detection of ESBL-producing strains is crucial for effective treatment and infection control.

Purpose of the Study:

  • To compare the discriminating power of the E-Test with conventional methods for identifying bacterial strains harboring ESBLs.
  • To evaluate the utility of the E-Test for epidemiologic surveillance of ESBL-resistant strains.

Main Methods:

  • Comparative analysis of the E-Test against agar dilution, disk diffusion, and broth microdilution (PASCO system).
  • Assessment of quantitative data generation and strain differentiation capabilities.

Main Results:

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  • The E-Test provided quantitative data comparable to agar dilution across a wide concentration range.
  • The E-Test demonstrated superior performance over disk diffusion and the PASCO system for ESBL detection.
  • The E-Test facilitates accurate identification and epidemiologic surveillance of ESBL-producing bacteria.

    • Conclusions:

    • The E-Test is a highly effective method for detecting bacterial strains with plasmid-mediated ESBLs.
    • Its superior performance makes it valuable for clinical diagnostics and public health surveillance of antimicrobial resistance.