Azoles

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

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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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Molds-Broth Microdilution Testing (CLSI)-Introduction, Principle, Clinical Significance, and Keynotes

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Introduction Invasive mold infections such as those caused by Aspergillus, Fusarium, Scedosporium, and Mucorales present significant clinical challenges, especially in immunocompromised hosts. Mortality rates are high, and empirical antifungal therapy often fails due to intrinsic or acquired resistance. Standardized antifungal susceptibility testing (AFST) is therefore …

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Yeasts-Broth Microdilution Testing (EUCAST): Introduction, Principle, Clinical Significance, and Keynotes

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Yeasts-Broth Microdilution Testing (EUCAST) Introduction, Principle, Clinical Significance, and Keynotes

Introduction Fungal infections caused by yeasts, particularly Candida and Cryptococcus species, represent a significant clinical challenge in immunocompromised and critically ill patients. Antifungal susceptibility testing (AFST) is crucial for guiding therapy, particularly in cases of treatment failure or the emergence of resistance. The broth microdilution …

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Yeasts (Disk Diffusion) Assay: Introduction, Test Requirements, Procedure, Result-Interpretation, and Keynotes

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Yeasts (Disk Diffusion) Assay

Introduction Disk diffusion assay is a standardized method used for testing antifungal susceptibility of yeasts, especially Candida spp. It evaluates the inhibitory effect of antifungal agents on yeast growth by measuring the zone of inhibition around drug-impregnated disks placed on inoculated agar. This method is …

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Candida albicans-Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

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Yeast cells, budding yeasts, and pseudohyphae in KOH mount of sputum microscopic examination

Introduction Candida albicans is a common fungal pathogen in humans. It inhabits mucosal surfaces naturally and colonizes the gastrointestinal tract and genitourinary system frequently. The organism causes infections in both healthy and immunocompromised individuals and adapts quickly to environmental changes within the host. Clinicians report …

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Prototheca: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

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Prototheca in Gram staining

Introduction Morphology Prototheca exhibits a unique morphology in cultural media. It forms smooth, creamy colonies on SDA. Moreover, its colonies remain non-filamentous. It produces spherical or oval cells in microscopic preparations. Furthermore, cells display a thick, refractile wall. In addition, internal endospores are occasionally arranged …

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Candida albicans MCQs Quiz-A Simple Set of Questionnaire for Examination

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Candida albicans MCQs Quiz-A Simple Set of Questionnaire for Examination

Introduction Below is a simple set of 15 multiple‐choice questions (MCQs) on Candida albicans designed as a quiz or examination questionnaire. Each question is provided with four answer choices, and the correct answer is indicated after each question. Candida albicans MCQs Quiz 1. Which species …

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Candida parapsilosis: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

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Candida parapsilosis growth on Candida CHROMagar

Introduction Candida parapsilosis is a species of yeast that belongs to the Candida genus, which includes various fungi commonly found in the environment and on the human body. Candida species are part of the normal human microbiota, residing on the skin, mucous membranes, and gastrointestinal …

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