Gypseum Fungus Infection Characteristics
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Questions and Answers

What is the causative agent of 'black piedra'?

  • Malassezia furfur
  • Piedraia hortae (correct)
  • Hortaea werneckii
  • Trichosporon spp.
  • Which organism causes 'Tinea nigra' resulting in brown to black non-scaly macules on palms and soles?

  • Trichosporon spp.
  • Malassezia furfur
  • Hortaea werneckii (correct)
  • Piedraia hortae
  • What is the appearance of 'spaghetti and meatballs fungus' under potassium hydroxide?

  • Yellow fluorescence
  • Wood lamp effect
  • Brown nodules
  • Spaghetti and meatballs appearance (correct)
  • Which type of mycoses infects the outermost layer of skin or hair?

    <p>Superficial mycoses</p> Signup and view all the answers

    Which organism is misdiagnosed as species meatball due to its appearance?

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

    What is the main substrate utilized by dermatophytes as a source of nitrogen?

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

    Which agent exhibits a 'Drumstick' appearance and Septate hyphae under direct microscopic examination?

    <p>Alternaria spp.</p> Signup and view all the answers

    Which stain detects melanization and stains fungal elements brown-black in a red background?

    <p>Fontana-Masson</p> Signup and view all the answers

    Which fungus forms germ tubes at both ends at 25°C after 24 hours of incubation?

    <p>Alternaria spp.</p> Signup and view all the answers

    Which fungal genus has geniculate conidiophores that are bent where conidia are attached?

    <p>Exophiala spp.</p> Signup and view all the answers

    Which fungus exhibits long and branched chains of conidiophores with hyaline septate conidia?

    <p>Curvularia spp.</p> Signup and view all the answers

    What is a common cause of tinea cruris and tinea pedis?

    <p>Epidermophyton spp.</p> Signup and view all the answers

    In chromoblastomycosis, how are the agents commonly acquired?

    <p>Through traumatic inoculation by foreign objects</p> Signup and view all the answers

    Which type of microscopy reveals the presence of thin-walled macroconidia with rounded tips in chromoblastomycosis?

    <p>Microscopic appearance: thin-walled macroconidia with rounded tips</p> Signup and view all the answers

    Which method is used to obtain a laboratory diagnosis for chromoblastomycosis?

    <p>Molecular method</p> Signup and view all the answers

    What distinguishes phaeohyphomycosis-causing fungi from others?

    <p>Primary conidia giving rise to secondary conidia</p> Signup and view all the answers

    What type of infection are Eumycotic Mycetomas characterized as?

    <p>Chronic infection</p> Signup and view all the answers

    Which characteristic best describes the colony appearance of Epidermophyton spp.?

    <p>Powdery surface with buff or cinnamon color</p> Signup and view all the answers

    Which staining method causes pigmented hyphae to appear black in laboratory diagnosis?

    <p>Fontana-Masson stain</p> Signup and view all the answers

    What is the characteristic feature of Scedosporium boydii's anamorph stage?

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

    Which fungal species is associated with white mycetoma as mentioned in the text?

    <p>Acremonium spp.</p> Signup and view all the answers

    What is the color of the colonies produced by Madurella spp. on Potato dextrose agar?

    <p>White-dark gray</p> Signup and view all the answers

    What is the characteristic microscopic appearance of Acremonium spp.?

    <p>Unbranched, multiseptated sinale conidiophore</p> Signup and view all the answers

    What is the most common cause of ringworm infection of the scalp and hair?

    <p>Trichophyton tonsurans</p> Signup and view all the answers

    Which direct detection method for clinically significant Trichophyton involves revealing hyaline septate hyphae or arthroconidia?

    <p>Staining with calcofluor white</p> Signup and view all the answers

    Which species of dermatophyte is attracted to humans and is a common cause of ringworm infections?

    <p>Trichophyton rubrum</p> Signup and view all the answers

    What is the clinical presentation of Tinea favosa, a condition caused by dermatophytes?

    <p>Crusty lesions made up of dead epithelia</p> Signup and view all the answers

    Which dermatophyte species infects the nails and is characterized by slow growth and clavate or peg-shaped microconidia?

    <p>Trichophyton mentagrophytes</p> Signup and view all the answers

    Which direct detection method for clinically significant Trichophyton shows spores filling the hairshaft or ensheathing the hair shaft?

    <p>Endothrix spores filling hairshaft</p> Signup and view all the answers

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