Cutaneous Mycoses Flashcards

1
Q
Which is not anthrophilic fungus?
A. M.audonii
B. T.rubrum
C. M.gypseum
D. T.tonsurans
A

C

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2
Q

Identify EA of dermatophytosis

  • macroconidia: walls are rough + not parallel. small denticles @ ext wall
  • with microconidia
A

Microsporum

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3
Q

Identify EA of dermatophytosis

  • macroconidia: smooth walled
  • with microconidia
A

Trichophyton

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4
Q

Identify EA of dermatophytosis

  • macroconidia: walls are rough + not parallel. small denticles @ ext wall
  • no microconidia BUT with chlamydoconidia
A

Epidermophyton

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5
Q

Differentiate tinea capitis fr tinea favosa

A

tinea capitis: alopecia temporary

tinea capitis: alopecia permanent

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6
Q

When does tinea capitis become erythematous?

A

zoophilic EA

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7
Q

causative agent of Tinea imbricata

A

Tricophyton concentricum

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8
Q

Differentiate tinea ungiuum from onychomycosis

A

Onychomycosis:possibly caused by non-dermatophyte

Tinea ungiuum is caused by dermatophyte

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9
Q

enum mst prob EA of tinea cruris

A

Epidermophyton floccosum

Trichophyton rubrum

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10
Q
which is not done in wet mount of cutaneous mycoses?
A. 10%KOH
B. LPCB
C. Parker superquink ink
D. gentle warming
A

B

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11
Q

Which destroys the hair cuticle?
A.ectothrix
B.endothrix
C.both

A

A

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12
Q

Which is seen @ Wood’s Lamp?
A.ectothrix
B.endothrix
C.both

A

A

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13
Q

Which is caused by anthrophilic fungus?
A.ectothrix
B.endothrix
C.both

A

B

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14
Q

When to use:

  • blunt scalpel
  • swab
A
  • blunt scalpel: fr skin, nail

* swab: picking up loose skin / debris

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15
Q

When to use:

  • forceps
  • bone curette
A
  • forceps: hair, loose skin scales

* bone curette: skin fr scalp, skin, perianal, feet

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16
Q

severe form of Tinea pedis

A

Moccasin Foot

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17
Q

enumerate members of group 1 Tricophyton

A

verrucosum
Schoenlenii
Concentricum

18
Q
common feature of all members for group 1 Tricophyton
A)(+) inositol thiamine reaction
B)seldom produce spores
C)requires histidine
D)A and B
E)all of the above
A

D

19
Q
common feature of all members for group 2 Tricophyton
A)all grow in thiamine
B)seldom produce spores
C)requires histidine
D)A and B
E)all of the above
A

A

20
Q

Which member of Trichophyton grp 2 may grow on Agar 1

A

T.tonsurans

21
Q

Which member of Trichophyton grp 2 may perforate hair in 2-3 weeks

A

T.mentagrophytes

22
Q

sole member of Group 3

A

T.violeceum

23
Q

Differentiate T.violaceum fr T.tonsurans

A

tonsurans: lots of microconidia
violaceum: seldom microconidia

24
Q

Differentiate T.megnini fr T.equinum (members of Tricho grp 4)

A

megnini - req histidine

equinum - req nicotinic acid

25
Q

identify EA
A. white cottony growth with reverse golden yellow
B. thick walled verrucose macroconidia
C. zoophilic

A

Microsporum canis

26
Q
identify EA
A. cinnamon growth
B. thin walled verrucose macroconidia
C. geophilic
D. usually produces single lesion
A

Microsporum gypseum

27
Q
identify EA
A. white to cream. powdery/granular
B. "en-grappe", with spiral hyphae
C. (+)for hair perf & urease
D. spherical microconidia
A

T. mentagrophytes

28
Q
identify EA
A. anthrophilic
B. "en-thyrse" microconidia
C. (-)for hair perf & urease
D. wine red pigment at reverse
A

T.rubrum

29
Q
identify EA
A. anthrophilic
B. suede like to powdery, pale buff/yellow
C. partial reqt of thiamine
D. variable macroconidia
A

T.tonsurans

30
Q
identify EA
A. "antler tips" hyphae
B. Chlamydoconidia
C. tinea imbricata
D. does not invade hair
A

T.concentricum

31
Q
identify EA
A.no macro&microconidia
B.scutula: saucer shaped crusted lesion
C.waxy or galbrous culture
D.tinea favosa
A

T.schoenleinii

32
Q
identify EA
A. green brown/khaki sudelike
B. Chlamydoconidia
C. no microconidia
D. does not invade hair in vivo
A

E.floccosum

33
Q

differentiate M.canis fr M.gypseum

A

M.canis : thick walled macroconidia + zoophil

M.gypseum: thinwalled macroconidia + geophil

34
Q

“en-grappe”, with spiral hyphae

A

T.mentagrophytes

35
Q

partial reqt of thiamine, variable macroconidia

A

T.tonsurans

36
Q

“antler tips” hyphae

A

T.concentricum

37
Q

What is scutula and in what mycoses is it seen?

A

saucer shaped crusted lesion

Tinea favosa

38
Q

“en-thyrse” microconidia

A

T.rubrum

39
Q

no macro&microconidia

only favic chandeliers

A

T.schoenleinii

40
Q

T/F. All cutaneous mycoses are caused by dermatophytes.

A

F. Systemic fungi may also cause