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Diagnostic Mycology: Xtreme Challenges.

Brian L Wickes1, Anna M Romanelli2

  • 1Department of Microbiology, Immunology, and Molecular Genetics, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA Wickes@uthscsa.edu.

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Developing fungal diagnostic assays for FDA approval presents unique challenges. These include technical issues like template preparation and fungal morphology, alongside administrative hurdles for clinical integration.

Keywords:
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Area of Science:

  • Medical diagnostics
  • Clinical microbiology
  • Mycology

Background:

  • United States Food and Drug Administration (FDA) approval is a rigorous process for diagnostic assays.
  • Currently, FDA-approved fungal diagnostic assays are limited, primarily targeting candidiasis and a few systemic fungal agents.
  • Numerous hurdles impede the development and market entry of novel fungal diagnostic assays.

Purpose of the Study:

  • To outline the specific challenges encountered in developing fungal diagnostic assays for FDA approval.
  • To highlight the complexities that differentiate fungal assay development from other microbial diagnostics.
  • To provide a comprehensive overview of the obstacles hindering the advancement of fungal diagnostics.

Main Methods:

  • The study reviews existing literature and regulatory pathways for diagnostic assay approval.
  • It identifies and categorizes common and unique challenges in fungal diagnostic assay development.
  • Analysis focuses on technical, biological, and administrative aspects of assay integration into clinical laboratories.

Main Results:

  • Key challenges include template preparation, understanding fungal morphology, and determining assay scope (number of fungi identified).
  • Difficulties also arise from fungal taxonomy and nomenclature, differentiating colonization from infection, and integrating antifungal susceptibility testing.
  • Navigating administrative processes for clinical laboratory integration poses significant hurdles.

Conclusions:

  • Fungal diagnostic assay development faces multifaceted challenges, distinct from other microbial assays.
  • Overcoming these hurdles is crucial for expanding the availability of accurate and timely fungal diagnostics.
  • Addressing these issues will facilitate the integration of advanced fungal tests into routine clinical practice.