Microbiology: Opportunistic Mycoses
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Questions and Answers

What is critical for host defense against systemic candidiasis?

  • Eosinophils
  • Monocytes
  • Neutrophils (correct)
  • Basophils

Which of the following produces blue colonies on CHROMagar?

  • Candida krusei
  • Candida tropicalis
  • Candida albicans (correct)
  • Candida glabrata

What is the major clinical manifestation of cryptococcosis?

  • Acute meningitis
  • Subacute meningitis
  • Not applicable
  • Chronic meningitis (correct)

What is the stain used to visualize the capsule of Cryptococcus neoformans?

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

Which is the most common human pathogen among the various Aspergillus species?

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

What is the primary source of Candidiasis infections?

<p>Endogenous infection from normal flora (B)</p> Signup and view all the answers

Which of the following species of Candida has emerged as a multidrug-resistant species globally?

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

What is the term for the group of fungal infections that affect patients with compromised host defenses?

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

Which of the following is NOT a type of Opportunistic Mycoses?

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

What is the genus of fungi that causes Cryptococcosis?

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

What is the most prevalent systemic mycosis?

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

What is the characteristic of yeast colonies in Candidiasis?

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

Which of the following is a major risk factor for Cryptococcosis?

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

Who are highly susceptible to cryptococcosis?

<p>Patients with AIDS or hematologic malignancies (D)</p> Signup and view all the answers

What is the primary mode of diagnosing Cryptococcosis?

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

What is the most common human pathogen among Aspergillus species?

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

What is the treatment for Cryptococcosis?

<p>Defined course of amphotericin B followed by itraconazole (C)</p> Signup and view all the answers

How do patients typically contract Aspergillosis?

<p>Through inhalation of conidia (C)</p> Signup and view all the answers

What is a common symptom of Aspergillosis in immunocompromised patients?

<p>Cough, dyspnea, weight loss, fatigue, and hemoptysis (B)</p> Signup and view all the answers

What is the name of the structure that produces conidia in Aspergillus species?

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

What is the characteristic color of C.glabrata colonies?

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

What is the primary site of infection for Cryptococcus species?

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

What is the characteristic feature of Cryptococcus species in culture?

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

Which of the following is a characteristic of yeast cells of Cryptococcus species?

<p>Spherical shape with a thick capsule (B)</p> Signup and view all the answers

What is the significance of a positive culture from normally sterile body sites in candidiasis?

<p>It is always significant (C)</p> Signup and view all the answers

What is the treatment for invasive aspergillosis?

<p>Rapid administration of amphotericin B or voriconazole (B)</p> Signup and view all the answers

Which of the following fungi is the most prevalent agent of mucormycosis?

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

What is the primary goal of efforts made for persons at risk for allergic disease or invasive aspergillosis?

<p>To avoid exposure to the conidia of Aspergillus species (A)</p> Signup and view all the answers

What is the characteristic feature of the hyphae of Rhizopus oryzae in mucormycosis?

<p>Broad, ribbon-like hyphae with uneven thickness, irregular branching, and sparse septations (B)</p> Signup and view all the answers

What is the treatment for rhinocerebral mucormycosis?

<p>Rapid administration of amphotericin B and aggressive surgical debridement (A)</p> Signup and view all the answers

What is the typical CD4 lymphocyte count below which Pneumocystis pneumonia is usually seen?

<p>400/μL (C)</p> Signup and view all the answers

Which of the following stains is NOT used to visualize Pneumocystis jiroveci cysts?

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

What is a major risk factor for Penicillosis infection?

<p>Immunodeficiency due to HIV/AIDS (A)</p> Signup and view all the answers

What is a common manifestation of Penicillosis infection?

<p>Systemic involvement of multiple organs (A)</p> Signup and view all the answers

What is the treatment approach for Pneumocystis pneumonia?

<p>Rapid administration of amphotericin B (B)</p> Signup and view all the answers

Which of the following is a characteristic of Pneumocystis jiroveci infection?

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

What is the primary site of infection in Pneumocystis pneumonia?

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

What is the term for the group of fungal infections that affect patients with compromised host defenses?

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

Which of the following is a characteristic of Penicillosis infection?

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

What is the genus of fungi that causes Penicillosis infection?

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

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