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 (A)</p> Signup and view all the answers

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

<p>Chromoblastomycosis (D)</p> Signup and view all the answers

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

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

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

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

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

<p>Dermatophytes (A)</p> Signup and view all the answers

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

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

What type of hyphae does Microsporum canis have?

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

Which fungus is responsible for Pityriasis versicolor?

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

What condition is commonly known as 'jock itch'?

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

What is the characteristic of aerial hyphae?

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

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

<p>Arthroconidium (C)</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 (B)</p> Signup and view all the answers

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

<p>Sporangiospore (C)</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 (D)</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 (D)</p> Signup and view all the answers

What is the significance of a positive Histoplasmin skin test?

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

Which feature is characteristic of Coccidioidomycosis when observed under microscopy?

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

How is Blastomycosis typically confirmed through culture?

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

When is treatment with Amphotericin B indicated in Histoplasmosis?

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

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

<p>Paracoccidioides brasiliensis (C)</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 (C)</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 (B)</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 (B)</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 (B)</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 (D)</p> Signup and view all the answers

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

<p>Chromomycosis (B)</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 (D)</p> Signup and view all the answers

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

<p>Systemic Mycosis (D)</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 (B)</p> Signup and view all the answers

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

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

Which feature distinguishes Actinomycetes from other bacteria?

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

What type of infection is candidiasis considered to be?

<p>Endogenous (A)</p> Signup and view all the answers

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

<p>Sporotrichosis (A)</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 (D)</p> Signup and view all the answers

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

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

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

<p>Tear-shaped conidia (A)</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 (B)</p> Signup and view all the answers

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

<p>Blastomycosis (A)</p> Signup and view all the answers

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

<p>Spherules with endospores (B)</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 (A)</p> Signup and view all the answers

What type of fungus is Paracoccidioides brasiliensis?

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

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

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

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

<p>Blastomycosis (A)</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 (C)</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 (D)</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 (C)</p> Signup and view all the answers

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

<p>Histoplasmosis (D)</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 (C)</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 (B)</p> Signup and view all the answers

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

<p>Hypertension (B)</p> Signup and view all the answers

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

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

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

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

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

<p>Epidermophyton floccosum (E)</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 (D)</p> Signup and view all the answers

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