Trichosporon species: Introduction, Morphology, Medically Important Species, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

A plastic petri dish containing a light-yellowish, finely wrinkled (cerebriform) and dry Trichosporon microbial culture with a flat, mealy (farinose) covering on PDA agar

Introduction Trichosporon is a genus of anamorphic, yeast-like basidiomycetous fungi widely distributed in nature, particularly in tropical and temperate regions. First identified by Beigel in 1865, it commonly exists as a saprophytic organism in soil, water, plants, and animal droppings. In humans, it is a …

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Saprochaete capitata:Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Saprochaete capitata in Dalmau plate technique microscopic footage

Introduction Saprochaete capitata is an emerging opportunistic fungal pathogen that causes severe, frequently fatal systemic infections in profoundly immunocompromised individuals. It is notorious for its intrinsic resistance to echinocandins and high resistance to fluconazole, which often results in breakthrough fungemia during standard empirical antifungal therapy. …

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VITEK 2 Yeast AST System: Introduction, Name of Card, Principle, Procedure, Result-Interpretation, and Keynotes

VITEK 2 AST-YS08-Yeast Indentification Card

Introducton The VITEK 2 Yeast AST system is a fully automated solution for the quantitative determination of antifungal susceptibility in clinically significant yeasts, such as Candida species. It provides rapid and accurate results, often in as little as 13 to 24 hours. Name of Card …

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Pichia kudriavzevii-Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Pichia kudriavzevii growth on HiCrome Candida Differential Agar

Introduction Pichia kudriavzevii, formerly known as Candida krusei, is a unique budding yeast that holds a dual status as both a critical industrial organism and an emerging opportunistic pathogen.  Taxonomy: It is the teleomorph (sexual state) of Candida krusei. It has also been historically known as Issatchenkia orientalis. …

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

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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Penicillium vs Paecilomyces: Introduction, Detailed Comparison, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynotes

Penicillium typical structure in LPCB preparation

Introduction of Penicillium vs Paecilomyces Penicillium is a ubiquitous, saprophytic mold found in soil, air, and decaying organic matter. Known for producing the first antibiotic, penicillin, it is typically non-pathogenic but occasionally causes opportunistic infections in immunocompromised hosts. Paecilomyces (especially P. lilacinus and P. variotii) …

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Fungemia-Introduction, Common Fungi, Clinical Feature, Lab Diagnosis, Treatment, and Prevention

Blood fungal culture bottles containing a biphasic medium used for detecting fungal growth in fungemic patients

Introduction Fungemia refers to the presence of fungi in the bloodstream, indicating systemic fungal infection. Candida species are most commonly responsible, but other yeasts and molds may also invade the bloodstream. Fungemia is a medical emergency, especially in ICU patients, immunocompromised hosts, post-surgical cases, and …

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Fungal Pneumonia-Introduction, Common fungi, Clinical Feature, Lab Diagnosis, Treatment, and Prevention

Aspergillus fumigatus growth on Sabouraud dextrose agar (SDA) plate

Introduction Fungal pneumonia or invasive fungal pulmonary infection is often life-threatening, especially in immunocompromised patients, such as those with cancer, undergoing chemotherapy, or with HIV/AIDS. pulmonary inflammation caused by inhaled fungal spores or hematogenous fungal spread, leading to pneumonia-like illness. Common Fungi Causing Pulmonary Infections: …

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