Flashcards in 7. Dermatophytes Deck (47):
1
Animal to human route of infection
Zoophilic
2
Person to person route of infection
Anthropophilic
3
Infection of facial hair
Tinea barbae (Barber's itch)
4
Infection of the scalp
Tinea capitis
5
Infection of the arms, legs, and trunk
Tinea corporis (ringworm)
6
Infection of the groin area
Tinea cruris (Jock itch)
7
Infection of the face
Tinea faciei
8
Infection of the hands
Tinea manuum
9
Infection of the spaces between toes
Tinea pedis (Athlete's foot)
10
Infection of the fingernails ans toenails
Tinea unguinum
11
Infection of the hair follicle, crusty lesions
Favic
12
Infection that colonizes the outside part of the hair shaft
Ectothrix
13
Infection of the hair follicle first, then grows inside the shaft
Endothrix
14
Infection of the nail and nail bed
Onchomycosis
15
Specimens for dermatophyte ID
Hair
Hair scraping
Nail scraping or clipping
16
Modification of KOH preparation for dermatophyte ID
Calcofluor
17
Temp and time for growth of dermatophytes
30°C for 4 weeks on SDA
18
3 major genera under Dermatophytes
Microsporum
Epidermophyton
Trichophyton
19
Macroconidia: rare, thin-walled, smooth
Microconidia: numerous
Trichophyton
20
Macroconidia: numerous, thick-walled, rough
Microconidia: usually present
Microsporum
21
Macroconidia: numerous, thin- and thick-walled, smooth
Microconidia: not formed
Epidermophyton
22
Geophilic dermatophytes
Microsporum gypseum
Microsporum nanum
Trichophyton rubrum
23
Zoophilic dermatophytes
Microsporum canis
Trichophyton mentagrophytes
24
Anthropophilic dermatophytes
Microsporum audouinii
Epidermophyton floccosum
Trichophyton mentagrophytes
Trichophyton tonsurans
Trichophyton schoenleinii
25
Has rare distorted macroconidia, rare microconidia
Microsporum audouinii
26
No growth on sterile rice media
Microsporum audouinii
27
Has large spindle-shaped macroconidia (3-15 cells, tapering ends)
Microsporum canis
28
Has "rowboat"-shaped macroconidia
Microsporum gypseum
29
Powdery/granular buff to brown colony
Microsporum gypseum
30
Rare cause of tinea corporis in humans
Microsporum nanum
31
Causes tinea cruris, pedis, and unguium
Epidermophyton floccosum
32
Has khaki-yellow colonies
Epidermophyton floccosum
33
As smooth-walled, club-shaped, groupings of macoconidia (beaver's tail)
Epidermophyton floccosum
34
Infects all 3 keratinized tissues
Trichophyton mentagrophytes
35
Most common cause of athlete's foot
Trichophyton mentagrophytes
36
Has spiral hyphae
Trichophyton mentagrophytes
37
Microconidia: round, clustering
Macroconidia: cigar-shaped
Trichophyton mentagrophytes
38
Perforates hair
Trichophyton mentagrophytes
39
Urease positive
Trichophyton mentagrophytes
40
Ectothrix dermatophyte
Trichophyton rubrum
41
Endothrix dermatophytes
Trichophyton tonsurans
Trichophyton schoenleinii
42
Tear-drop shaped microconidia
Trichophyton rubrum
43
"Black dot" tinea capitis
Trichophyton tonsurans
44
Vitamin needed by Trichophyton tonsurans
Thiamine
45
Dermatophyte that requires thiamine
Trichophyton tonsurans
46
Has antler-shaped hyphae
Trichophyton schoenleinii
47