Mycology — Flashcards

Flashcard 101: _____ is a superficial fungal infection of the hair shaft

Answer: Piedra

Flashcard 102: Which species of *Penicillium* is thermally **dimorphic**?

Answer: *Penicillium marneffei* (Talaromyces marneffei)

Extra: *P. marneffei* is the only dimorphic species of the genus *Penicillium*. It is a significant opportunistic pathogen in Southeast Asia (especially in HIV+ patients). Note: Unlike other dimorphic fungi that bud, the yeast form of *P. marneffei* divides by **transverse fission**.

Flashcard 103: Piedraia hortae is almost unique among the human pathogenic fungi in producing sexual spores in its _____ phase

Answer: parasitic

Flashcard 104: Which trichophyton species cause endothrix?_____

Answer: T. tonsurans and T. violaceum

Flashcard 105: Classification of fungi based on spore formation:_____ consist of yeasts and filamentous fungi

Answer: Ascomycota

Flashcard 106: Microsporum audouinii, M. canis, M. equinum, and M. ferrugineum cause _____thrix infection.

Answer: ecto

Flashcard 107: Which fungus shows a characteristic appearance resembling a pilot's wheel or 'Mickey Mouse' appearance?

Answer: *Paracoccidioides brasiliensis*

Flashcard 108: Tinea pedis or ringworm of foot is most commonly caused by Trichophyton _____ infections

Answer: rubrum

Flashcard 109: Microscopic finding of flower-like clusters of conidia with branching hyphae are suggestive of _____

Answer: sporotrichosis

Flashcard 110: A positive hair perforation test is caused by Trichophyton _____

Answer: mentagrophytes