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Fungal skin infections Flashcards

1
Q

Superficial mycoses

A

Tinea versicolor

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2
Q

Cutaneous mycoses

A

Dermatophytosis/ringworm
Candidiasis

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3
Q

Subcutaneous mycoses

A

Sporotrichosis
Mycetoma
Chromomycosis
Rhinosporidiosis

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4
Q

Systemic mycoses

A

Coccidioidomycosis
Blastomycosis
Paracoccidioidomycosis
Histoplasmosis

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5
Q

Fungus that causes tinea versicolor

A

Malassezia furfur

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6
Q

Fungi that cause dermatophytosis

A

Trichophyton
Microsporum
Epidermophyton

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7
Q

Fungus that causes sporotrichosis

A

Sporothrix schenkii

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8
Q

Fungus that causes coccidioidomycosis

A

Coccidioides immitis

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9
Q

Fungus that causes blastomycosis

A

Blastomyces dermatitidis

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10
Q

Fungus that causes paracoccidioidmycosis

A

Paracoccidioides brasiliensis

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11
Q

Transmission of Malassezia furfur

A

Direct or indirect transfer of infected keratinous material from one person to another

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12
Q

Dry, scaly, hypo/hyperpigmented lesions on the upper trunk, arms, chest, shoulders, face, or neck

A

Tinea versicolor

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13
Q

Spherical yeast cells mixed with short, angular hyphae in skin scraping

A

Tinea versicolor

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14
Q

Treatment for tinea versicolor

A

Topical azoles –> ketoconazole or itraconazole

Selenium sulfide

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15
Q

Infector form for dermatophytosis and transmission

A

Arthrospores

Person to person, fomites

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16
Q

Most common cause of tinea capitus in children

A

Trichophyton dermatophytosis

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17
Q

Branching, hyaline septate and fungal hyphae on KOH mount

A

Dermatophytosis

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18
Q

Lactophenol cotton blue staining is used in the diagnosis

A

Dermatophytosis

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19
Q

Shows moldy growth at room temp in sebouradus dextrose sugar

A

Dermatophytosis

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20
Q

Treatment for dermatophytosis

A

Miconazole
Clotrimazole
Itraconazole
Whitfield ointment

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21
Q

Combination of benzoic and salicylic acid

A

Whitfield ointment

22
Q

Oval yeast-like forms that produce buds/blastoconidia, pseudohyphae and true hyphae. Forms germ tubes and terminal thick-walled chlamydoconidia

A

Candida albicans

23
Q

Fungal infections that present as pruritic rash with erythematous vesiculopustular lesions and well-defined plaques with satellite plaques and pustules

A

Candidiasis

24
Q

Treatment of cutaneous candidiasis

A

Several topical agents that contain azoles

25
Fungal lesion that is scaly and extremely itchy with expanding border and less inflammed center caused
Dermatophytosis
26
Gram stain in candidiasis
Oval budding yeast cells with pseudohyphae
27
General transmission of subq mycoses
Traumatic inoculation
28
Rose garderner's disease
Sporotrichosis
29
Conidia infection that binds to ECM proteins and multiplies, stimulating neutrophils and granulomatous inflammation
Sporotrichosis
30
How sporothrix schenkii survives in the body
Resists oxidative killing and spreads through lymphatic
31
Painless nodules or ulcers at the site of inoculation and along the draining lymphatic chain
Sporotrichosis
32
Treatment for sporotrichosis
Itraconazole Amphotericin B
33
General transmission of systemic mycoses
Inhalation of spores that germinate in the lungs
34
GMS, PAS, or Giemsa stain shows broad based budding yeasts
Blastomycosis
35
Treatment of blastomycosis
Itraconazole Amphotericin B Fluconazole if progressed to meningitis
36
Tissue form is a large, distinctive spherule
Coccidioides immitus
37
Rectangular/barrel-shaped arthrospores cause infection
Coccidiomycosis
38
Grows in sandy alkaline soil with high salinity
Coccidioides immitus
39
Valley fever
Coccidiomycosis
40
Symptoms of Valley fever
Malaise Cough Chest pain Fever Arthralgia
41
Chest x-ray findings in coccidiomycosis
Hilar adenopathy
42
Erythematous macular rash, erythema multiforme or nodosum after dissemination of this systemic fungal infection
Coccidiomycosis
43
Highly infectious systemic fungal infection
Coccidiomycosis
44
Treatment of coccidiomycosis
Fluconazole Amphotericin B Itraconazole
45
Fungal infection endemic in central and South America
Paracoccidioidomycosis
46
Histology of paracoccidioidomycosis
Pilot wheel --> yeast with multiple buds
47
Endemic areas of coccidiomycosis
Southwestern USA and Latin America
48
Endemic areas of histoplasma
Ohio and Mississippi river valleys in US Associated with bird and bat guano --> worldwide
49
Endemic areas of blastomycosis
Central and southeastern USA Africa
50

MSK II (16 decks)

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