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In Vitro Susceptibility Testing in Fungi: What is its Role in Clinical Practice?

Susanne Perkhofer1, Cornelia Mrazek, Lukas Hartl

  • 1Division of Hygiene and Medical Microbiology, Innsbruck Medical University, Fritz Pregl Strasse 3, 6020, Innsbruck, Austria, susanne.perkhofer@i-med.ac.at.

Current Infectious Disease Reports
|February 11, 2011
PubMed

Insights

In vitro antifungal susceptibility testing is crucial for managing invasive fungal infections in immunocompromised patients. However, correlating these tests with clinical outcomes remains challenging due to complex fungal biology.

Area of Science:

  • Mycology
  • Infectious Diseases
  • Clinical Microbiology

Background:

  • Increasing prevalence of invasive fungal infections in immunocompromised patients undergoing transplantation, chemotherapy, or immunosuppression.
  • Emergence of antifungal resistance necessitates reliable susceptibility testing methods.
  • Growing population of immunocompromised hosts worldwide.

Purpose of the Study:

  • To review available in vitro antifungal susceptibility testing methods for yeasts and filamentous fungi.
  • To discuss the clinical implications and challenges of interpreting antifungal susceptibility test results.
  • To highlight the need for better correlation between in vitro data and in vivo outcomes.

Main Methods:

  • Review of established antifungal susceptibility testing procedures including macrodilution, microdilution, agar diffusion, disk diffusion, and Etest.
  • Analysis of existing data on clinical correlations of in vitro antifungal susceptibility testing.
  • Examination of the limitations of current susceptibility techniques in reflecting in vivo fungal biology.

Main Results:

  • Multiple in vitro methods exist for assessing antifungal susceptibility in fungi.
  • Clinical correlation of susceptibility testing remains a significant challenge.
  • Current in vitro methods do not fully capture the complex interactions between antifungals and fungi in vivo.

Conclusions:

  • In vitro antifungal susceptibility testing is essential for guiding treatment of invasive fungal infections.
  • Further research is needed to improve the clinical relevance of antifungal susceptibility testing.
  • Understanding the limitations of current methods is key to optimizing antifungal therapy in immunocompromised patients.

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