Detecting Low-Yield Target Fungal DNA from Bronchoalveolar Lavage Fluid: Sensitivity Limits of Conventional vs. Quantitative PCR

Detecting Low-Yield Target Fungal DNA from Bronchoalveolar Lavage Fluid: Sensitivity Limits of Conventional vs. Quantitative PCR

Introduction 0.5 ng/µL of DNA is detectable and can yield a positive result by PCR. In modern molecular diagnostics, PCR is incredibly sensitive. While 0.5 ng/µL might seem like a low concentration on a spectrophotometer (like a NanoDrop), it is actually a substantial amount of …

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Quick Fungal and Bacterial DNA Extraction: Introduction, Principle, Method, Procedure, DNA Concentration, Application, and Keynotes

Using Nano spectrophotometer to detect DNA concentration

 Introduction The Quick-DNA™ Fungal/Bacterial Miniprep Kit is designed for the simple and rapid extraction of high-quality genomic DNA from organisms that are notoriously tough to lyse. The entire process is engineered to bypass tedious enzymatic steps, completing extraction in as little as 15 to 20 …

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Cladophialophora: Introduction, Pathogenicity, Lab Diagnosis, Treatment, Prevention, and Keynote

The image displays a network of pale brown, pigmented, septate hyphae producing highly branched chains of spores of Cladophialophora

Introduction Pathogenicity Lab Diagnosis Treatment Prevention Keynote Keynote Rule of Thumb: Think of Cladophialophora bantiana as “The Neurotropic Black Mold.” It is the most common cause of fungal brain abscesses in immunocompetent hosts. Any radiological ring-enhancing brain mass that mimics a tumor but presents with …

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Nail Clippings KOH Mount: Introduction and Principle, Procedure, Result-Interpretation, Clinical Significance, and Keynotes

Hyaline septate fungal hyphae in KOH mount of nail clipping at a magnification of 1000x with 8x optical zoom

Introduction and Principle A nail clipping KOH (Potassium Hydroxide) mount is the fastest and most cost-effective diagnostic test used to detect fungal elements in nails. It serves as the primary screening tool for confirming onychomycosis (fungal nail infection) before starting long-term oral antifungal therapy The …

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Geotrichum klebahnii: Introduction, Morphology, Pathogenicity, Lab Diagnosis, Treatment, and Prevention

Lacking blastoconidia (budding yeast cells), distinguishing Geotrichum klebahnii from Trichosporon

Introduction Geotrichum klebahnii is a rare, opportunistic, yeast-like fungus that is found globally in environments like soil, dairy products, and organic waste, but can act as an emerging pathogen in humans. Along with Geotrichum candidum, it is one of the only species within its genus …

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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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HVAC Filters-Introduction, Principle, Working Mechanism, Application, and Keynotes

Introduction to HVAC Filters Air filters act as the first line of defense in an HVAC system. As air continuously circulates through a building, it carries invisible particulate matter, including dust, pollen, pet dander, mold spores, and bacteria. Without an air filter, these particles settle …

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