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Flashcards in Superficial Mycoses Deck (19):
1

causative agent of white piedra

Trichosporon beigelli / Trichosporon cutaneum

2

causative agent of black piedra

Piedraia hortae

3

causative agent of an-an

Malassezia furfur

4

causative agent of tinea nigra

Exophiala werneckii

5

lesion of pityriasis versicolor is what color under Wood's lamp

fluorescent green

6

false about Malassezia fur fur
A.lipophilic yeast
B.not part of skin normal flora
C.culture not necessary

B

part soya

7

morphology of M.furfur under KOH/PAS

spaghetti with meatballs

8

treatment of an-an aside from fungicides and miconazole

selenium sulfide (1%) shampoo for 15 mins

9

false about Exophiala werneckii
A.it looks more like a yeast as it grows older
B.with dematiaceous hyphae
C.occurs in aggregated masses

A

more like mold dapat

10

keratinolytic agent for treatment of E.werneckii or tinea nigra

Whitfield's ointment

11

in piedra: what are fungal elements cemented together along hair shaft

nodules

12

Which is more concentrated, firmer and harder?
A.white piedra
B.black piedra
C.equal

B

13

Piedraia hortae - describe morphology

round to oval ascus (packman) curved to form ascospores (firework like); can have 8 ascospores in 1 ascus

14

Which has nodules with irreg transparent sheath?
A.white piedra
B.black piedra
C.equal

A

15

morphology of white piedra EA @ KOH

Hyaline septate hyphae & oval/rectangular arthroconidia

16

false about biochemical tests of T.cutaneum/beigelii
A.assimilates dextrose, lactose, D-xylose, inositol
B.does not ferment carbohydrates
C.splits arbutin
D.urease positive

D

17

true or false. pityriasis versicolor is always hypopigmentation

False

it is always reverse of your skin color

18

Which is seen more in pubic area?
A.white piedra
B.black piedra
C.equal

a

19

Which is seen more in scalp area?
A.white piedra
B.black piedra
C.equal

B