Cutaneous Mycoses Flashcards
Which is not anthrophilic fungus? A. M.audonii B. T.rubrum C. M.gypseum D. T.tonsurans
C
Identify EA of dermatophytosis
- macroconidia: walls are rough + not parallel. small denticles @ ext wall
- with microconidia
Microsporum
Identify EA of dermatophytosis
- macroconidia: smooth walled
- with microconidia
Trichophyton
Identify EA of dermatophytosis
- macroconidia: walls are rough + not parallel. small denticles @ ext wall
- no microconidia BUT with chlamydoconidia
Epidermophyton
Differentiate tinea capitis fr tinea favosa
tinea capitis: alopecia temporary
tinea capitis: alopecia permanent
When does tinea capitis become erythematous?
zoophilic EA
causative agent of Tinea imbricata
Tricophyton concentricum
Differentiate tinea ungiuum from onychomycosis
Onychomycosis:possibly caused by non-dermatophyte
Tinea ungiuum is caused by dermatophyte
enum mst prob EA of tinea cruris
Epidermophyton floccosum
Trichophyton rubrum
which is not done in wet mount of cutaneous mycoses? A. 10%KOH B. LPCB C. Parker superquink ink D. gentle warming
B
Which destroys the hair cuticle?
A.ectothrix
B.endothrix
C.both
A
Which is seen @ Wood’s Lamp?
A.ectothrix
B.endothrix
C.both
A
Which is caused by anthrophilic fungus?
A.ectothrix
B.endothrix
C.both
B
When to use:
- blunt scalpel
- swab
- blunt scalpel: fr skin, nail
* swab: picking up loose skin / debris
When to use:
- forceps
- bone curette
- forceps: hair, loose skin scales
* bone curette: skin fr scalp, skin, perianal, feet
severe form of Tinea pedis
Moccasin Foot
enumerate members of group 1 Tricophyton
verrucosum
Schoenlenii
Concentricum
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
D
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
Which member of Trichophyton grp 2 may grow on Agar 1
T.tonsurans
Which member of Trichophyton grp 2 may perforate hair in 2-3 weeks
T.mentagrophytes
sole member of Group 3
T.violeceum
Differentiate T.violaceum fr T.tonsurans
tonsurans: lots of microconidia
violaceum: seldom microconidia
Differentiate T.megnini fr T.equinum (members of Tricho grp 4)
megnini - req histidine
equinum - req nicotinic acid
identify EA
A. white cottony growth with reverse golden yellow
B. thick walled verrucose macroconidia
C. zoophilic
Microsporum canis
identify EA A. cinnamon growth B. thin walled verrucose macroconidia C. geophilic D. usually produces single lesion
Microsporum gypseum
identify EA A. white to cream. powdery/granular B. "en-grappe", with spiral hyphae C. (+)for hair perf & urease D. spherical microconidia
T. mentagrophytes
identify EA A. anthrophilic B. "en-thyrse" microconidia C. (-)for hair perf & urease D. wine red pigment at reverse
T.rubrum
identify EA A. anthrophilic B. suede like to powdery, pale buff/yellow C. partial reqt of thiamine D. variable macroconidia
T.tonsurans
identify EA A. "antler tips" hyphae B. Chlamydoconidia C. tinea imbricata D. does not invade hair
T.concentricum
identify EA A.no macro&microconidia B.scutula: saucer shaped crusted lesion C.waxy or galbrous culture D.tinea favosa
T.schoenleinii
identify EA A. green brown/khaki sudelike B. Chlamydoconidia C. no microconidia D. does not invade hair in vivo
E.floccosum
differentiate M.canis fr M.gypseum
M.canis : thick walled macroconidia + zoophil
M.gypseum: thinwalled macroconidia + geophil
“en-grappe”, with spiral hyphae
T.mentagrophytes
partial reqt of thiamine, variable macroconidia
T.tonsurans
“antler tips” hyphae
T.concentricum
What is scutula and in what mycoses is it seen?
saucer shaped crusted lesion
Tinea favosa
“en-thyrse” microconidia
T.rubrum
no macroµconidia
only favic chandeliers
T.schoenleinii
T/F. All cutaneous mycoses are caused by dermatophytes.
F. Systemic fungi may also cause
