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</p> Signup and view all the answers

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

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

    What is the primary source of Candidiasis infections?

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

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

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

    What is the genus of fungi that causes Cryptococcosis?

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

    What is the most prevalent systemic mycosis?

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

    What is the characteristic of yeast colonies in Candidiasis?

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

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

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

    Who are highly susceptible to cryptococcosis?

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

    What is the primary mode of diagnosing Cryptococcosis?

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

    What is the most common human pathogen among Aspergillus species?

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

    What is the treatment for Cryptococcosis?

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

    How do patients typically contract Aspergillosis?

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

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

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

    What is the characteristic color of C.glabrata colonies?

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

    What is the primary site of infection for Cryptococcus species?

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

    What is the characteristic feature of Cryptococcus species in culture?

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

    What is the treatment for invasive aspergillosis?

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

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

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

    What is the treatment for rhinocerebral mucormycosis?

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

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

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

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

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

    What is a major risk factor for Penicillosis infection?

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

    What is a common manifestation of Penicillosis infection?

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

    What is the treatment approach for Pneumocystis pneumonia?

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

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

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

    What is the primary site of infection in Pneumocystis pneumonia?

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

    Which of the following is a characteristic of Penicillosis infection?

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

    What is the genus of fungi that causes Penicillosis infection?

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

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