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Elsevier Mycology (RVSP) > 7. Dermatophytes > Flashcards

7. Dermatophytes Flashcards

1
Q

Animal to human route of infection

A

Zoophilic

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2
Q

Person to person route of infection

A

Anthropophilic

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3
Q

Infection of facial hair

A

Tinea barbae (Barber’s itch)

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4
Q

Infection of the scalp

A

Tinea capitis

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5
Q

Infection of the arms, legs, and trunk

A

Tinea corporis (ringworm)

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6
Q

Infection of the groin area

A

Tinea cruris (Jock itch)

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7
Q

Infection of the face

A

Tinea faciei

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8
Q

Infection of the hands

A

Tinea manuum

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9
Q

Infection of the spaces between toes

A

Tinea pedis (Athlete’s foot)

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10
Q

Infection of the fingernails ans toenails

A

Tinea unguinum

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11
Q

Infection of the hair follicle, crusty lesions

A

Favic

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12
Q

Infection that colonizes the outside part of the hair shaft

A

Ectothrix

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13
Q

Infection of the hair follicle first, then grows inside the shaft

A

Endothrix

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14
Q

Infection of the nail and nail bed

A

Onchomycosis

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15
Q

Specimens for dermatophyte ID

A

Hair
Hair scraping
Nail scraping or clipping

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16
Q

Modification of KOH preparation for dermatophyte ID

A

Calcofluor

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17
Q

Temp and time for growth of dermatophytes

A

30°C for 4 weeks on SDA

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18
Q

3 major genera under Dermatophytes

A

Microsporum
Epidermophyton
Trichophyton

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19
Q

Macroconidia: rare, thin-walled, smooth
Microconidia: numerous

A

Trichophyton

20
Q

Macroconidia: numerous, thick-walled, rough
Microconidia: usually present

A

Microsporum

21
Q

Macroconidia: numerous, thin- and thick-walled, smooth
Microconidia: not formed

A

Epidermophyton

22
Q

Geophilic dermatophytes

A

Microsporum gypseum
Microsporum nanum
Trichophyton rubrum

23
Q

Zoophilic dermatophytes

A

Microsporum canis

Trichophyton mentagrophytes

24
Q

Anthropophilic dermatophytes

A 
Microsporum audouinii
Epidermophyton floccosum
Trichophyton mentagrophytes
Trichophyton tonsurans
Trichophyton schoenleinii
25
Q

Has rare distorted macroconidia, rare microconidia

A

Microsporum audouinii

26
Q

No growth on sterile rice media

A

Microsporum audouinii

27
Q

Has large spindle-shaped macroconidia (3-15 cells, tapering ends)

A

Microsporum canis

28
Q

Has “rowboat”-shaped macroconidia

A

Microsporum gypseum

29
Q

Powdery/granular buff to brown colony

A

Microsporum gypseum

30
Q

Rare cause of tinea corporis in humans

A

Microsporum nanum

31
Q

Causes tinea cruris, pedis, and unguium

A

Epidermophyton floccosum

32
Q

Has khaki-yellow colonies

A

Epidermophyton floccosum

33
Q

As smooth-walled, club-shaped, groupings of macoconidia (beaver’s tail)

A

Epidermophyton floccosum

34
Q

Infects all 3 keratinized tissues

A

Trichophyton mentagrophytes

35
Q

Most common cause of athlete’s foot

A

Trichophyton mentagrophytes

36
Q

Has spiral hyphae

A

Trichophyton mentagrophytes

37
Q

Microconidia: round, clustering
Macroconidia: cigar-shaped

A

Trichophyton mentagrophytes

38
Q

Perforates hair

A

Trichophyton mentagrophytes

39
Q

Urease positive

A

Trichophyton mentagrophytes

40
Q

Ectothrix dermatophyte

A

Trichophyton rubrum

41
Q

Endothrix dermatophytes

A

Trichophyton tonsurans

Trichophyton schoenleinii

42
Q

Tear-drop shaped microconidia

A

Trichophyton rubrum

43
Q

“Black dot” tinea capitis

A

Trichophyton tonsurans

44
Q

Vitamin needed by Trichophyton tonsurans

A

Thiamine

45
Q

Dermatophyte that requires thiamine

A

Trichophyton tonsurans

46
Q

Has antler-shaped hyphae

A

Trichophyton schoenleinii

47
Q

Soil to man route of infection

A

Geophilic

Elsevier Mycology (RVSP) (13 decks)

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