Basic Mycology: Structure and Growth
40 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the main component of the fungal cell wall?

  • Glucan
  • Chitin (correct)
  • Peptidoglycan
  • Ergosterol

Which of the following fungi induce a pyogenic response in the host?

  • Amanita
  • Histoplasma
  • Coccidioides
  • Aspergillus, Mucor, and Sporothrix (correct)

What is the effect of amanitin on the host cell?

  • Inhibition of protein synthesis
  • Inhibition of DNA replication
  • Inhibition of RNA polymerase (correct)
  • Stimulation of cell division

What is the characteristic of yeast reproduction?

<p>Budding with unequal-sized daughter cells (D)</p> Signup and view all the answers

At which temperature do some fungi exist as molds?

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

What is the characteristic of the yeast form of Paracoccidioides brasiliensis?

<p>Single, broad-based bud and thick, refractile wall (A)</p> Signup and view all the answers

Which of the following is a predisposing factor for Candida albicans infection?

<p>Altered skin and mucous membrane (D)</p> Signup and view all the answers

How is Candida albicans typically transmitted?

<p>Part of the normal flora of skin, mucous membranes, and GI tract (B)</p> Signup and view all the answers

What is the common location of skin lesions in Candida albicans infection?

<p>Moisture-damaged skin (D)</p> Signup and view all the answers

Which of the following fungal infections is commonly seen in infants?

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

What is the purpose of using KOH in a microscopic examination of a fungal sample?

<p>To visualize fungal structures (C)</p> Signup and view all the answers

What is the mechanism of action of Amphotericin B?

<p>Binding to fungal cell membranes at the site of ergosterol (D)</p> Signup and view all the answers

What is the purpose of using Sabouraud's agar in fungal cultures?

<p>To allow for the growth of slower-growing fungi (C)</p> Signup and view all the answers

What is the type of hypersensitivity response caused by the inhalation of Aspergillus fumigatus spores?

<p>IgE-mediated immediate hypersensitivity response (C)</p> Signup and view all the answers

What is the mechanism of action of Echinocandins?

<p>Inhibiting the synthesis of D-glucan (C)</p> Signup and view all the answers

What is the characteristic of Candida albicans that distinguishes it from other Candida species?

<p>Germ tube production (C)</p> Signup and view all the answers

What is the primary mode of transmission of Cryptococcus neoformans?

<p>Inhalation of airborne yeast cells (D)</p> Signup and view all the answers

What is the characteristic of Cryptococcus neoformans that makes it a significant pathogen?

<p>Its heavily encapsulated yeast (A)</p> Signup and view all the answers

What is the purpose of the skin test in diagnosing Candida infections?

<p>To determine the competency of cell-mediated immunity (B)</p> Signup and view all the answers

What is the characteristic of microscopic examination of tissue in Candida infections?

<p>Reveals gram-positive yeast (A)</p> Signup and view all the answers

What is the characteristic of the hyphae of Aspergillus fumigatus?

<p>Mold with septate hyphae that branch at V-shaped angle (D)</p> Signup and view all the answers

What is the primary habitat of Aspergillus fumigatus?

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

Which patients are more susceptible to invasive disease caused by Aspergillus fumigatus?

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

What is the characteristic of the hyphae of Mucor and Rhizopus species?

<p>Molds with nonseptate hyphae that typically branch at 90-degree angle (C)</p> Signup and view all the answers

What is the primary site of infection in patients with mucormycosis?

<p>Sinuses and surrounding tissue (B)</p> Signup and view all the answers

What is the purpose of Histoplasmin in laboratory diagnosis?

<p>To determine the incidence of infection (A)</p> Signup and view all the answers

What is the mode of transmission of Sporothrix schenckii?

<p>Puncture wounds caused by rose thorns and other sharp objects (D)</p> Signup and view all the answers

What is the characteristic of Coccidioides immitis?

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

What is the purpose of Coccidioidin in laboratory diagnosis?

<p>To determine the incidence of infection (D)</p> Signup and view all the answers

What is the disease caused by Histoplasma capsulatum?

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

What is the primary source of nutrition for dermatophytes?

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

What is the characteristic of dermatophytes that allows them to infect human skin?

<p>Production of extracellular enzymes (B)</p> Signup and view all the answers

What is the term used to refer to a variety of lesions of skin or scalp caused by dermatophytes?

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

Which of the following is a type of cutaneous mycoses caused by dermatophytes?

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

What is the habitat of dermatophytes?

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

What is the mode of transmission of dermatophytes?

<p>Direct contact with skin scales (C)</p> Signup and view all the answers

What is the term used to describe the fungal infection of the nail?

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

What is the purpose of clipping the nail for culture in dermatophyte infections?

<p>To obtain a sample of the infected tissue (A)</p> Signup and view all the answers

Which of the following is a type of dermatophyte that causes cutaneous mycoses?

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

What is the term used to describe the fungal infection caused by Sporothrix schenckii?

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

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser