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Related Experiment Videos

"All-in-one-plate" E-test and disk diffusion susceptibility co-testing for multiresistant Acinetobacter baumannii.

J Gilad1, M Giladi, F Poch

  • 1Microbiology Laboratory, Tel-Aviv Sourasky Medical Center, 6 Weizman Street, Tel-Aviv 64239, Israel. giladko@014.net.il

European Journal of Clinical Microbiology & Infectious Diseases : Official Publication of the European Society of Clinical Microbiology
|November 9, 2006
PubMed
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Multiresistant Acinetobacter baumannii susceptibility testing can be improved by combining E-test and disk diffusion on one plate. This co-testing method is accurate, reproducible, and feasible for clinical microbiology labs.

Area of Science:

  • Clinical Microbiology
  • Antimicrobial Resistance
  • Diagnostic Testing

Background:

  • Multiresistant Acinetobacter baumannii poses a significant threat, necessitating reliable antimicrobial susceptibility testing (AST).
  • Current AST methods, like the VITEK-2 system, often require supplementary manual testing (E-test, disk diffusion) for accuracy with this pathogen.
  • Combining these manual methods could streamline the diagnostic workflow.

Purpose of the Study:

  • To evaluate the feasibility and accuracy of a combined E-test and disk diffusion method for Acinetobacter baumannii.
  • To compare the results of the combined method with standard control methods.
  • To assess the reproducibility of the novel co-testing approach.

Main Methods:

  • Developed a single-plate method combining E-test and disk diffusion assays.

Related Experiment Videos

  • Verified the combined method by comparing categorical agreement with control susceptibility testing plates.
  • Utilized ten representative bacterial strains for validation.

    • Main Results:

    • The combined E-test and disk diffusion method demonstrated high categorical agreement with control methods.
    • No very major, major, or minor errors were observed during the validation.
    • Consistent and similar results were obtained across all tested bacterial strains.

    Conclusions:

    • Co-testing of Acinetobacter baumannii susceptibility using a combined E-test and disk diffusion plate is feasible, accurate, and reproducible.
    • This integrated approach simplifies AST procedures.
    • Further evaluation with a broader range of bacterial species is warranted.