Fungal Infections Classification Quiz
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Questions and Answers

Which type of fungi is responsible for causing candidiasis?

  • Mould fungi
  • Penicillium fungi
  • Pathogenic yeast-like fungi (correct)
  • Dermatophyte fungi

    • Which type of body structures in tissues are considered diagnostic for sporotrichosis?

  • Rosette bodies
  • Asteroid bodies (correct)
  • Cigar bodies
  • Budding cells

    • How are organisms in sporotrichosis identified in tissue cultures?

  • Budding cells
  • Tear-shaped conidia
  • Rosette pattern conidia (correct)
  • Spherical sclerotic bodies

    • What type of hyphae are characteristic of Sporothrix schenckii?

    <p>Narrow septate hyphae</p> Signup and view all the answers

    Which fungal infection is characterized by brown pigmented spherical sclerotic bodies?

    <p>Chromoblastomycosis</p> Signup and view all the answers

    At what temperature does Sporothrix schenckii grow as a yeast form?

    <p>+37°C</p> Signup and view all the answers

    Which of the following is NOT a risk factor for fungal infections?

    <p>Regular exercise</p> Signup and view all the answers

    Which type of fungi affect skin, nail, and hair structures abundant in keratin?

    <p>Dermatophytes</p> Signup and view all the answers

    Which of the following is a disease caused by Dermatophytes affecting the scalp?

    <p>Tinea capitis</p> Signup and view all the answers

    What type of hyphae does Microsporum canis have?

    <p>Septate with spingle-shaped macroconidia</p> Signup and view all the answers

    Which fungus is responsible for Pityriasis versicolor?

    <p>Malassezia furfur</p> Signup and view all the answers

    What condition is commonly known as 'jock itch'?

    <p>Tinea cruris</p> Signup and view all the answers

    What is the characteristic of aerial hyphae?

    <p>Develops above the agar surface</p> Signup and view all the answers

    Which type of spore is formed by fragmentation of hyphae into short oblong rounded elements?

    <p>Arthroconidium</p> Signup and view all the answers

    What is the process of asexual reproduction that involves the development of a new cell as a similar outgrowth from the older parent cell?

    <p>Budding</p> Signup and view all the answers

    Which spore propagule forms inside a sporangium and can be spherical or cylindrical?

    <p>Sporangiospore</p> Signup and view all the answers

    What is the term for an asexual propagule that forms on the side or end of a hypha or conidiophore?

    <p>Conidium</p> Signup and view all the answers

    Which of the following represents an asexual vegetative spore formed by budding along a hypha, pseudohypha, or single cell?

    <p>Blastoconidia</p> Signup and view all the answers

    What is the significance of a positive Histoplasmin skin test?

    <p>Indicates exposure to Histoplasma capsulatum</p> Signup and view all the answers

    Which feature is characteristic of Coccidioidomycosis when observed under microscopy?

    <p>Spherules with endospores</p> Signup and view all the answers

    How is Blastomycosis typically confirmed through culture?

    <p>Conversion of arthrospores to spherules</p> Signup and view all the answers

    When is treatment with Amphotericin B indicated in Histoplasmosis?

    <p>Disseminated histoplasmosis</p> Signup and view all the answers

    Which of the following fungi is distributed in Brazil and South America?

    <p>Paracoccidioides brasiliensis</p> Signup and view all the answers

    What type of specimens are commonly used for the laboratory diagnosis of fungus infections?

    <p>Skin scraping and infected nail</p> Signup and view all the answers

    Which staining technique is used to observe the capsule around yeast, like Cryptococcus neoformans?

    <p>India Ink preparation</p> Signup and view all the answers

    What should be observed in direct microscopy of sputum or pus samples for fungus infections?

    <p>Budding yeast cells and hyphae</p> Signup and view all the answers

    Which of the following is used in direct microscopy preparations to digest tissue elements like epithelial cells and debris?

    <p>10% KOH preparation</p> Signup and view all the answers

    Which staining technique involves phenol to kill any organism while lactic acid preserves fungal structures?

    <p>Lactophenol cotton blue stain</p> Signup and view all the answers

    Which type of fungal infection is characterized by brown pigmented spherical sclerotic bodies?

    <p>Chromomycosis</p> Signup and view all the answers

    In which category of fungal infections are infections mostly acquired in healthcare settings and are almost always opportunistic?

    <p>Nosocomial</p> Signup and view all the answers

    Which of the following is NOT caused by Actinomycetes (true bacteria)?

    <p>Systemic Mycosis</p> Signup and view all the answers

    What is the seventh most common cause of infectious diseases over the past two and a half decades?

    <p>Fungal Infections</p> Signup and view all the answers

    Which of the following fungi are most commonly responsible for opportunistic mycoses?

    <p>Aspergillus, Rhizopus, Mucor</p> Signup and view all the answers

    Which feature distinguishes Actinomycetes from other bacteria?

    <p>Formation of Filament Chains</p> Signup and view all the answers

    What type of infection is candidiasis considered to be?

    <p>Endogenous</p> Signup and view all the answers

    Which fungal infection is characterized by the presence of asteroid bodies in tissues?

    <p>Sporotrichosis</p> Signup and view all the answers

    In which subcutaneous fungal infection would you typically find brown pigmented spherical sclerotic bodies under microscopy?

    <p>Chromoblastomycosis</p> Signup and view all the answers

    What is the most frequent agent causing maduromycosis (madura foot)?

    <p>Pseudallescheria boydii</p> Signup and view all the answers

    Which characteristic helps in the identification of Sporothrix schenckii under microscopy?

    <p>Tear-shaped conidia</p> Signup and view all the answers

    Which staining technique is used to observe conidia in a typical rosette pattern for Sporothrix schenckii?

    <p>Lactophenol cotton blue (LFCB) stain</p> Signup and view all the answers

    Which fungal infection can be confirmed by the presence of spherules with endospores in sputum?

    <p>Blastomycosis</p> Signup and view all the answers

    What is the characteristic microscopic appearance of Coccidioides immitis in culture for confirmation?

    <p>Spherules with endospores</p> Signup and view all the answers

    Which fungal infection is characterized by the presence of thick-walled, broad-based, single budding yeast in sputum samples?

    <p>Blastomycosis</p> Signup and view all the answers

    What type of fungus is Paracoccidioides brasiliensis?

    <p>Dimorphic fungus</p> Signup and view all the answers

    In Histoplasmosis, when is treatment with Amphotericin B typically required?

    <p>Progressive pulmonary disease</p> Signup and view all the answers

    Which fungal infection demonstrates dimorphism when cultured on Saboraud’s & Mycobiotic agar?

    <p>Blastomycosis</p> Signup and view all the answers

    What type of staining technique is used to observe the capsule around yeast, like Cryptococcus neoformans?

    <p>India Ink preparation</p> Signup and view all the answers

    Which type of fungal infection can be diagnosed using skin scraping, infected hair, or infected nails as specimens?

    <p>Paracoccidioidomycosis</p> Signup and view all the answers

    What is the characteristic staining feature used in direct microscopy preparations to look for budding yeast cells, hyphae, and pseudohyphae?

    <p>10% KOH preparation</p> Signup and view all the answers

    Which type of fungal disease is typically confirmed through culture by observing spherules in specimens?

    <p>Histoplasmosis</p> Signup and view all the answers

    In the context of laboratory diagnosis of fungus infections, which specimen type is commonly used to diagnose systemic mycoses?

    <p>Bone marrow</p> Signup and view all the answers

    What microscopic examination technique involves negative staining to observe fungal structures without staining the organism?

    <p>India Ink preparation</p> Signup and view all the answers

    Which risk factor is NOT associated with an increased susceptibility to fungal infections?

    <p>Hypertension</p> Signup and view all the answers

    Which type of fungi causes tinea capitis, a ringworm infection of the scalp?

    <p>Microsporum canis</p> Signup and view all the answers

    Which dermatophyte fungus is known for affecting skin, nail, and hair structures with an abundance of keratin?

    <p>Trichophyton mentagrophytes</p> Signup and view all the answers

    Which fungal infection is commonly referred to as 'jock itch'?

    <p>Tinea cruris</p> Signup and view all the answers

    Which fungus can be identified by its septate hyphae with smooth, club-shaped macroconidia?

    <p>Epidermophyton floccosum</p> Signup and view all the answers

    Which fungal infection primarily affects the feet and is commonly known as athlete's foot?

    <p>Tinea pedis</p> Signup and view all the answers

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