Superficial Mycoses Flashcards
causative agent of white piedra
Trichosporon beigelli / Trichosporon cutaneum
causative agent of black piedra
Piedraia hortae
causative agent of an-an
Malassezia furfur
causative agent of tinea nigra
Exophiala werneckii
lesion of pityriasis versicolor is what color under Wood’s lamp
fluorescent green
false about Malassezia fur fur
A.lipophilic yeast
B.not part of skin normal flora
C.culture not necessary
B
part soya
morphology of M.furfur under KOH/PAS
spaghetti with meatballs
treatment of an-an aside from fungicides and miconazole
selenium sulfide (1%) shampoo for 15 mins
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
keratinolytic agent for treatment of E.werneckii or tinea nigra
Whitfield’s ointment
in piedra: what are fungal elements cemented together along hair shaft
nodules
Which is more concentrated, firmer and harder?
A.white piedra
B.black piedra
C.equal
B
Piedraia hortae - describe morphology
round to oval ascus (packman) curved to form ascospores (firework like); can have 8 ascospores in 1 ascus
Which has nodules with irreg transparent sheath?
A.white piedra
B.black piedra
C.equal
A
morphology of white piedra EA @ KOH
Hyaline septate hyphae & oval/rectangular arthroconidia
