Fungal Biology Terminologies

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Questions and Answers

Which type of fungus is responsible for causing Tinea capitis?

  • Trichophyton
  • Epidermophyton
  • Candida
  • Microsporum (correct)

Which of the following is NOT a type of dermatophyte fungus?

  • Trichophyton
  • Epidermophyton
  • Microsporum
  • Candida (correct)

Which of the following is a subcutaneous mycosis disease caused by a dimorphic fungus?

  • Candidiasis
  • Maduromycosis
  • Sporotrichosis (correct)
  • Chromoblastomycosis

What is the most common causative agent of Maduromycosis (Madura foot)?

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

Which of the following is a common clinical manifestation of Candidiasis?

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

What is the diagnostic feature for Sporotrichosis observed under the microscope?

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

Which of the following stains is used to detect mucinous substances in fungal infections?

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

Which of these fungal infections typically resolves without treatment in immunocompetent individuals?

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

What is the first-line treatment for progressive pulmonary disease and disseminated histoplasmosis?

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

Which of the following is a characteristic of the fungus that causes paracoccidioidomycosis?

<p>It is a thermally dimorphic fungus found in Brazil and South America. (C)</p> Signup and view all the answers

Which of the following specimens is most commonly used for the laboratory diagnosis of systemic mycoses?

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

What is the purpose of the 10% KOH preparation in the microscopic examination of fungal specimens?

<p>To dissolve the keratin matrix and reveal fungal structures (A)</p> Signup and view all the answers

Which of the following terms refers to hyphae that are located above the agar surface?

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

Which term describes an asexual propagule formed by the breaking up of a hypha?

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

What is the term used to describe a conidium formed by budding along a hypha, pseudohypha, or single cell, as in yeast?

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

Which term describes an enlarged, rounded conidium that is thick-walled and may be located at the end or along the hypha, singly or in chains?

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

What term is used to describe fungal structures that are brown to black due to the presence of melanotic pigment in the cell wall?

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

Which term describes a process of asexual reproduction in which the new cell develops as a similar outgrowth from the older parent cell, as in yeast or yeast-like fungi?

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

Which of the following is NOT a cause of opportunistic mycoses?

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

Which of the following statements about actinomycetes is INCORRECT?

<p>They are responsible for causing candidiasis (D)</p> Signup and view all the answers

Which of the following hyaline fungi could be a contaminant or implicated in infection?

<p>All of the above (D)</p> Signup and view all the answers

Which of the following is NOT a characteristic of phaeohyphomycetes?

<p>They include species of Candida and Cryptococcus (D)</p> Signup and view all the answers

Which of the following statements about hyphae is CORRECT?

<p>They can be either aseptate or septate (B)</p> Signup and view all the answers

Which of the following is NOT a type of asexual spore?

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

What type of staining technique is commonly used for the identification of Histoplasma capsulatum?

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

At what temperature is the dimorphic, tuberculate macroconidia of Histoplasma capsulatum cultured?

<p>25°C (C)</p> Signup and view all the answers

Which of the following fungal infections is characterized by the presence of spherules with endospores upon microscopy?

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

What is the distinctive characteristic of Blastomyces dermatitidis seen under microscopy?

<p>Thick-walled, broad-based, single budding yeast (A)</p> Signup and view all the answers

Which staining technique is not commonly used for the identification of systemic mycoses?

<p>Gram stain (C)</p> Signup and view all the answers

Which fungal infection can be identified through a positive histoplasmin skin test indicating exposure only?

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

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