Gypseum Fungus Infection Characteristics

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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?

Superficial mycoses Signup and view all the answers

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

Malassezia furfur Signup and view all the answers

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

Keratin Signup and view all the answers

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

Alternaria spp. Signup and view all the answers

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

Fontana-Masson Signup and view all the answers

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

Alternaria spp. Signup and view all the answers

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

Exophiala spp. Signup and view all the answers

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

Curvularia spp. Signup and view all the answers

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

Epidermophyton spp. Signup and view all the answers

In chromoblastomycosis, how are the agents commonly acquired?

Through traumatic inoculation by foreign objects Signup and view all the answers

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

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

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

Molecular method Signup and view all the answers

What distinguishes phaeohyphomycosis-causing fungi from others?

Primary conidia giving rise to secondary conidia Signup and view all the answers

What type of infection are Eumycotic Mycetomas characterized as?

Chronic infection Signup and view all the answers

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

Powdery surface with buff or cinnamon color Signup and view all the answers

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

Fontana-Masson stain Signup and view all the answers

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

Swelling Signup and view all the answers

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

Acremonium spp. Signup and view all the answers

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

White-dark gray Signup and view all the answers

What is the characteristic microscopic appearance of Acremonium spp.?

Unbranched, multiseptated sinale conidiophore Signup and view all the answers

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

Trichophyton tonsurans Signup and view all the answers

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

Staining with calcofluor white Signup and view all the answers

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

Trichophyton rubrum Signup and view all the answers

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

Crusty lesions made up of dead epithelia Signup and view all the answers

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

Trichophyton mentagrophytes Signup and view all the answers

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

Endothrix spores filling hairshaft Signup and view all the answers