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Mycoviro (Finals) > 5.1 Cutaneuos > Flashcards

5.1 Cutaneuos Flashcards

1
Q

Idiosyncratic allergic response to a dermatophyte infection elsewhere in
the body

a. Dermatophytid
b. Dermatophytes
c. Dermatomycosis
d. Dermatology

A

a

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2
Q

Endothrix
→ Infects the hair surface
→ Will fluoresce in UV Wood’s lamp

Exothrix
→ Dermatophyte invades hair shaft
→ Will not fluoresce in UV Wood’s lamp

T or F

A

F

Baligtad

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3
Q

“Gray-patch” Tinea capitis can be seen in Exothrix

T or F

A

T

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4
Q

“Black dot” Tinea capitis can be seen in Endothrix

T or F

A

T

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5
Q

Endothrix
- Cuticle is destroyed
- Arthroconidia is destroyed

T or F

A

F

Both are not destroyed

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6
Q

Human tissue response

Anthropophilic: Mild
Geophilic: Severe
Zoophilic: Moderate

T or F

A

T

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7
Q

Epidermophyton: Skin nails
Microsporum: Skin, Hair
Trichophyton: Skin, Nails, Hair

T or F

A

T

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8
Q

Medium with antibiotics is recommended for dermatophytes

T or F

A

T

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9
Q

This reduce growth of saprobic Fungi

a. Cycloheximide
b. Chloramphenicol
c. Gentamicin

A

a

The rest are part of test medium

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10
Q

Indicator in Dermatophyte test medium

a. Bromothymol blue
b. Phenol red

A

b

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11
Q

Dermatophyte test medium can be use for confirmatory test?

T or F

A

F

Screening test only

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12
Q

Used for initial culture (for pigmentation)

a. PDA (Potate flake agar)
b. SDA
c. BAP
d. Dermatophyte test medium

A

a

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13
Q

Produce both macroconidia (spindle shaped; wall is thick & echinulate w/ up to 15 septa) and microconidia (less commonly seen; pyriform/clavate & borne directly to a conidiophore

a. Trichophyton
b. Microsporum
c. Epidermophyton

A

b

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14
Q

Produce macro and microconidia
→ Macroconidia: wall are relatively thin & smooth; cylindrincal or fusiform
conidia w/ 2-12 cells of conidium
→ Microconidia: (predominate) are globose, pyriform, or clavate

a. Trichophyton
b. Microsporum
c. Epidermophyton

A

a

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15
Q

Part of microconidia from trichophyton that is sleevelike arrangement around hyphae

a. en grappe
b. en thrysses

A

b

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16
Q

Part of microconidia from trichophyton that resembles bunches of grapes

a. en grappe
b. en thrysses

A

a

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17
Q
  • Never produces microconidia
  • Macroconidia have thin, smooth walls & contain 1-5 cells (May show beaver
    tail, paddles, or snowshoe structure)

a. Trichophyton
b. Microsporum
c. Epidermophyton

A

c

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18
Q

Differentiates T, Mentagrophytes and T. rubrum

a. In vitro hair perforation test
b. In vivo hair perforation test

A

a

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19
Q

Wedged shaped conical perforaion is positive result for in vivo hair perforation test

t or F

A

F
In vitro

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20
Q

Epidermophyton can be seen in adults but rarely in children

T or F

A

T

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21
Q

Microsporum does not cause spontaneous remission

T or F

22
Q

Trichophyton is usually chronic?

T or F

23
Q

The only epidermophyton spp?

a. E. floccosum
b. E. tinea
c. E. capitis
d. E. Coporis

24
Q

The disease cause this is Tinea cruris or Jock itch

a. E. floccosum
b. M. audouinii
c. M. canis
d. E. tinea

25
Risk factor for Epidermophyton floccosum? a. Higlyt contagoius b. Chronic c. None
a
26
Culture: Mycelium - Mustard yellow, "Khaki" Growth: Intermidiate Underside: Yellow-brown to Yellow orange a. E. floccosum b. E. tinea c. E. capis d. E. Cruris
a
27
E. floccosum is cultured in what media? a. PTA b. Sabouraod medium c. BAP
b
28
in human infection, this cause gray-patch tinea capitis in pre-puberty children; tinea corporis in children rarely in adults (ectothrix hair infection) a. Microsporum gypseum b. Microsporum canis c. Microsporum audouinii
c
29
Differential method is used for M. audouinii (Cooked rice) T or F
T
30
Colony: Flat and white -> Velvety with a tan surface pigment SDA - Reverse is beige to reddish brown PDA - Reverse is salmon pink -> Orange-brown
M. audoinii
31
The only microsporum with no telemorph a. Microsporum gypseum b. Microsporum canis c. Microsporum audouinii
c
32
Telemorph: Ascomycete (Arthroderma otae Reservoirs: Most common zoophile in human infection Childre are most likely targeted a. Microsporum gypseum b. Microsporum canis c. Microsporum audouini
b
33
Causes tinea corporis a. Microsporum gypseum b. Microsporum canis c. Microsporum audouinii
b
34
Wood's lamb: Yellow-green fluorescence a. Microsporum gypseum b. Microsporum canis c. Microsporum audouinii
a, b, c
35
M. audouinii and M. canis grows well on sterile cooked rice T or F
T
36
M. canis = Positive for hair perforation test M. audouinii = Negative for in vitro hair test T or F
T
37
SDA - flat with radial grooves, white to yellow colony Reverse: Bright yellow that turns to orange or brownish yellow a. Microsporum gypseum b. Microsporum canis c. Microsporum audouinii
b
38
Telemorph (Nannizia) Arthrodema gypseum and A. incurvatum Reservoir: World wide, geophilic MOT: soil Causes tinea capitis and coporis a. Microsporum gypseum b. Microsporum canis c. Microsporum audouinii
a
39
Invitro hair perforation for M. gypseum is positive T or F
T
40
SDA - White to downy, flat and granular (Surface pigment - tan to cinnamon-pink to brown and reverse is tan to orange-brown a. Microsporum gypseum b. Microsporum canis c. Microsporum audouinii
a
41
Trichophyton means? a. Hair plant b. skin plant c. Hair skin d. Animal hair
a
42
In trichophyton, scrappings from sin and nails cannot distinguish spp T or F
T
43
More or less parallel rows of arthropspores produced on surface of hair a. Ectothrix b. Endothrix
a
44
Arthrospores are 5-10 mm in diamter - Caused by T. verrucosum a. Small spored ectothrix b. Large-spored ectothrix c. Black-dot endothrix d. Favus hair
b
45
Arthrospores are <5mm in diameter - Caused by T. mentagrouphytes or T. rubrum a. Small spored ectothrix b. Large-spored ectothrix c. Black-dot endothrix d. Favus hair
a
46
Caused by T. tonsurans or T. violaceum a. Small spored ectothrix b. Large-spored ectothrix c. Black-dot endothrix d. Favus hair
c
47
Caused by T. scheonleinii a. Small spored ectothrix b. Large-spored ectothrix c. Black-dot endothrix d. Favus hair
d
48
SDA - Powder red, yellow, brown on surface, wrinkled colony - Many small club shaped spores - Improved growth with thiamine a. T. rubrum b. T. concentricum c. T. tonsurans
c
49
SDA - Fluffy white with red underside - No large spores - Small spores are spherical to elongate a. T. rubrum b. T. concentricum c. T. tonsurans
a
50
SDA - White to orange to brown colony with many wrinkles - Many stimulated by thiamine a. T. rubrum b. T. concentric c. T. tonsurans
b
51
T. mentagrophytes is positive for In vitro hair perforation test while T. rubrum is negative T or F
T

Mycoviro (Finals) (8 decks)

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