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Sas 2 Flashcards

1
Q

Hypopigmented macules

A

Pityriasis versicolor

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2
Q

Identification of organism:

“Spaghetti and meatballs” appearance of organism in skin scrapings

A

Malassezia furfur

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2
Q

Etiologic agent of Pityriasis versicolor

A

Malassezia furfur complex
Malassezia globosa
Malassezia restricta

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3
Q

Black macules

A

Tinea nigra

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4
Q

Etiologic agent of tinea nigra

A

Hortae (Exophilia) wernickii

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5
Q

Identification of organism:

Black, 2-celled oval yeast in skin scrapings

TINEA NIGRA

A

Hortae (Exophilia) wernickii

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6
Q

Black nodule on hair shaft

A

Black piedra

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7
Q

Etiologic agent of black piedra

A

Piedraia hortae

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8
Q

Identification of organism:

Black nodule on hair shaft composed of spore sacs and spores

A

Piedraia hortae

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9
Q

Creme-coloured nodules on hair shaft

A

White piedra

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10
Q

Etiologic agent of white piedra

A

Trichosporon ovoidis
Trichosporon inkin
Trichosporon beigelii

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11
Q

Identification of organism:

White nodule on hair shaft composed of mycelia that fragment into arthrospores

A

Trichosporon ovoidis
Trichosporon inkin
Trichosporon beigelii

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12
Q

Keratomycosis was first described by

A

Leber (Aspergillus species)

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13
Q

Major cause of blindness in Asia

A

Keratomycosis

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14
Q

Clinical picture:

White corneal plaques with the development of satellite lesions and endothelial plaques

A

Keratomycosis

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15
Q

Clinical picture:

Chronic fungal infection of the outer ear canal

A

Otomycosis

16
Q

Organism responsible for Otomycosis

A

Candida albicans
Candida tropicalis
Aspergillus fumigatus
Aspergillus niger

17
Q

Symptom:

pain, itchiness, redness, hearing loss, discharge from ears, swelling

A

Otomycosis

18
Q

Other name for Piedra

A

Chignon disease
Tinea nodosa
Biegel’s disease

19
Q

Piedra that occurs on scalp

A

Black piedra

20
Q

Dark brown gritty nodules firmly attached to hair shaft

A

Black piedra

21
Q

Nodules consists of asci/ascus (sack like structures) with 8 ascospores

A

Black piedra (Piedraia hortae)

22
Q

Microscopic ID:

10-20% KOH - hard and black nodules resembling nits of lice

A

Piedraia hortae

23
Q

Piedra found primarily on facial and genital hairs

A

White piedra

24
Q

Microscopic ID:

White nodules larger and softer
Septate not dematiaeous
Hyphae, tend to break into arthrospores

A

White piedra

25
Q

Clinical picture:

Superficial infection on the palm of the hands or the sole of the foot

A

Tinea nigra

26
Q

Clinical picture:

Patchy brown desquamating rash involving mainly the trunk, arms, shoulder and face “blotchy appearance”

A

Pityriasis versicolor

27
Q

Fawn-colored liver spots

A

Pityriasis versicolor

Mycology & Virology (10 decks)

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