Multiplex PCR Assay-Directly on Blood for Fungi: Introduction, Principle, Clinical Significance, and Keynotes

Introduction Fungal bloodstream infections (fungemia) are life-threatening, especially in immunocompromised and oncology patients. Conventional methods like blood culture are slow, often requiring several days for growth and identification. Multiplex PCR directly on blood offers rapid, sensitive, and simultaneous detection of multiple fungal pathogens without the …

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β-D-Glucan: Introduction, Principle, Clinical Significance, and Keynotes

Introduction β-D-Glucan (BDG) is a polysaccharide component of the fungal cell wall, widely present in species such as Candida, Aspergillus, Fusarium, and Pneumocystis jirovecii. Since it is released into the bloodstream during invasive fungal infections (IFIs), detection of BDG has become a valuable non-culture-based diagnostic …

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Blastomyces-Antigen Testing: Introduction, Principle, Clinical Significance, and Keynotes

Introduction Blastomyces dermatitidis is a dimorphic fungus responsible for blastomycosis, a potentially life-threatening systemic mycosis. It is often found in soil enriched with decaying organic matter, especially near rivers and lakes. Traditional diagnosis relies on culture, microscopy, or histopathology, which may take several weeks. To …

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Blood Culture–Positive Molds: Introduction, Common molds, Comparison, and Keynotes

Blood Culture–Positive Molds

Introduction Blood cultures are the cornerstone for diagnosing fungemia, but while yeasts (Candida spp.) are frequently detected, molds are rarely recovered in blood culture systems. This is because most molds (Aspergillus, Mucorales) cause tissue-invasive disease without sustained fungemia. However, certain molds such as Fusarium spp. …

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Yeasts-Colorimetric Antifungal Susceptibility Testing: Introduction, Principle, Clinical Significance, and Keynotes

Yeasts-Colorimetric Antifungal Susceptibility Testing-Introduction, Principle, Clinical Significance, and Keynotes

Introduction Yeasts, especially Candida and Cryptococcus species, are frequent causes of opportunistic infections in immunocompromised patients. Determining their antifungal susceptibility is crucial for guiding effective therapy. While broth microdilution methods (CLSI/EUCAST) serve as reference standards, they are labor-intensive and time-consuming. Colorimetric antifungal susceptibility testing systems …

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Yeast Identification by Chromogenic Media: Introduction, Principle, Clinical Significance, and Keynotes

Yeast Identification by Chromogenic Media (HiMedia)

Introduction of Yeast Identification by Chromogenic Media (HiMedia) Opportunistic yeasts, especially Candida species, are frequent causes of infections ranging from superficial candidiasis to life-threatening systemic disease. Conventional identification based on culture and biochemical tests can be time-consuming and may not reliably distinguish closely related species. …

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Yeast Identification by MALDI-TOF (VITEK): Introduction, Principle, Clinical Significance, and Keynotes

Yeast Identification by MALDI-TOF (VITEK): Introduction, Principle, Clinical Significance, and Keynotes

Introduction Yeasts, especially Candida species, are among the most important causes of opportunistic fungal infections in humans. Accurate and rapid identification is crucial for guiding antifungal therapy and improving patient outcomes. Traditional phenotypic methods are time-consuming and often misidentify cryptic species. Matrix-Assisted Laser Desorption/Ionization Time-of-Flight …

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Fungal Blood Culture-Mold: Introduction, Principle, Clinical Significance, and Keynotes

Fungal Blood Culture Bottle showing fungal growth

Introduction Molds such as Aspergillus, Fusarium, Scedosporium, and members of the Mucorales are important causes of invasive fungal infections, particularly in immunocompromised patients (oncology, transplant, hematology, ICU). Unlike yeasts (Candida, Cryptococcus), which are more frequently recovered from blood cultures, molds are rarely detected in routine …

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