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