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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

A

F

22
Q

Trichophyton is usually chronic?

T or F

A

T

23
Q

The only epidermophyton spp?

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

A

a

24
Q

The disease cause this is Tinea cruris or Jock itch

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

A

a

25
Q

Risk factor for Epidermophyton floccosum?

a. Higlyt contagoius
b. Chronic
c. None

A

a

26
Q

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

a

27
Q

E. floccosum is cultured in what media?

a. PTA
b. Sabouraod medium
c. BAP

A

b

28
Q

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

A

c

29
Q

Differential method is used for M. audouinii (Cooked rice)

T or F

A

T

30
Q

Colony: Flat and white -> Velvety with a tan surface pigment

SDA - Reverse is beige to reddish brown
PDA - Reverse is salmon pink -> Orange-brown

A

M. audoinii

31
Q

The only microsporum with no telemorph
a. Microsporum gypseum
b. Microsporum canis
c. Microsporum audouinii

A

c

32
Q

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

A

b

33
Q

Causes tinea corporis

a. Microsporum gypseum
b. Microsporum canis
c. Microsporum audouinii

A

b

34
Q

Wood’s lamb: Yellow-green fluorescence

a. Microsporum gypseum
b. Microsporum canis
c. Microsporum audouinii

A

a, b, c

35
Q

M. audouinii and M. canis grows well on sterile cooked rice

T or F

A

T

36
Q

M. canis = Positive for hair perforation test
M. audouinii = Negative for in vitro hair test

T or F

A

T

37
Q

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

A

b

38
Q

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

a

39
Q

Invitro hair perforation for M. gypseum is positive

T or F

A

T

40
Q

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

a

41
Q

Trichophyton means?

a. Hair plant
b. skin plant
c. Hair skin
d. Animal hair

A

a

42
Q

In trichophyton, scrappings from sin and nails cannot distinguish spp

T or F

A

T

43
Q

More or less parallel rows of arthropspores produced on surface of hair

a. Ectothrix
b. Endothrix

A

a

44
Q

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

A

b

45
Q

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

a

46
Q

Caused by T. tonsurans or T. violaceum

a. Small spored ectothrix
b. Large-spored ectothrix
c. Black-dot endothrix
d. Favus hair

A

c

47
Q

Caused by T. scheonleinii
a. Small spored ectothrix
b. Large-spored ectothrix
c. Black-dot endothrix
d. Favus hair

A

d

48
Q

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

A

c

49
Q

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

a

50
Q

SDA
- White to orange to brown colony with many wrinkles
- Many stimulated by thiamine

a. T. rubrum
b. T. concentric
c. T. tonsurans

A

b

51
Q

T. mentagrophytes is positive for In vitro hair perforation test while T. rubrum is negative

T or F

A

T

Mycoviro (Finals) (8 decks)

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