Cutaneous Mycoses

Question 1

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

Answer 1

C

Question 2

Identify EA of dermatophytosis

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

Answer 2

Microsporum

Question 3

Identify EA of dermatophytosis

• macroconidia: smooth walled
• with microconidia

Answer 3

Trichophyton

Question 4

Identify EA of dermatophytosis

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

Answer 4

Epidermophyton

Question 5

Differentiate tinea capitis fr tinea favosa

Answer 5

tinea capitis: alopecia temporary

tinea capitis: alopecia permanent

Question 6

When does tinea capitis become erythematous?

Answer 6

zoophilic EA

Question 7

causative agent of Tinea imbricata

Answer 7

Tricophyton concentricum

Question 8

Differentiate tinea ungiuum from onychomycosis

Answer 8

Onychomycosis:possibly caused by non-dermatophyte

Tinea ungiuum is caused by dermatophyte

Question 9

enum mst prob EA of tinea cruris

Answer 9

Epidermophyton floccosum

Trichophyton rubrum

Question 10

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

Answer 10

B

Question 11

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

Answer 11

A

Question 12

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

Answer 12

A

Question 13

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

Answer 13

B

Question 14

When to use:

• blunt scalpel
• swab

Answer 14

• blunt scalpel: fr skin, nail

* swab: picking up loose skin / debris

Question 15

When to use:

• forceps
• bone curette

Answer 15

• forceps: hair, loose skin scales

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

Question 16

severe form of Tinea pedis

Answer 16

Moccasin Foot

Question 17

enumerate members of group 1 Tricophyton

Answer 17

verrucosum
Schoenlenii
Concentricum

Question 18

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

Answer 18

D

Question 19

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

Answer 19

A

Question 20

Which member of Trichophyton grp 2 may grow on Agar 1

Answer 20

T.tonsurans

Question 21

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

Answer 21

T.mentagrophytes

Question 22

sole member of Group 3

Answer 22

T.violeceum

Question 23

Differentiate T.violaceum fr T.tonsurans

Answer 23

tonsurans: lots of microconidia
violaceum: seldom microconidia

Question 24

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

Answer 24

megnini - req histidine

equinum - req nicotinic acid

Question 25

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

Answer 25

Microsporum canis

Question 26

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

Answer 26

Microsporum gypseum

Question 27

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

Answer 27

T. mentagrophytes

Question 28

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

Answer 28

T.rubrum

Question 29

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

Answer 29

T.tonsurans

Question 30

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

Answer 30

T.concentricum

Question 31

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

Answer 31

T.schoenleinii

Question 32

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

Answer 32

E.floccosum

Question 33

differentiate M.canis fr M.gypseum

Answer 33

M.canis : thick walled macroconidia + zoophil | M.gypseum: thinwalled macroconidia + geophil

Question 34

"en-grappe", with spiral hyphae

Answer 34

T.mentagrophytes

Question 35

partial reqt of thiamine, variable macroconidia

Answer 35

T.tonsurans

Question 36

"antler tips" hyphae

Answer 36

T.concentricum

Question 37

What is scutula and in what mycoses is it seen?

Answer 37

saucer shaped crusted lesion | Tinea favosa

Question 38

"en-thyrse" microconidia

Answer 38

T.rubrum

Question 39

no macro&microconidia | only favic chandeliers

Answer 39

T.schoenleinii

Question 40

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

Answer 40

F. Systemic fungi may also cause