pityriasis versicolor Flashcards
what is pitiryasis versicolor
yeast infection on the skin that presents as white or pink coloured scaly patches on the trunk neck arms chest back
etiology
lipid dependant malassezia genus fungi colonization of skin
prone to young adults tha sweat heavily or in hot climates
clinical features
scaly patches of hypopigmented or pink patches
can co exist w/ sebboreach dermatitis ##
most common species on culture
m. GLOBOSA
m. RESTRICTA
m. SYMPODALIS
dg
wood lamp
KOH microscopy
skin biopsy
obs in wood lamp
yellpow green flourescence
obs in KOH microscopy
spaghetti and meatball presentation of yeast cells and hyphae
obs in skin biopsy
fungal elements in stratum corneum
rx of pityriasis versicolor
ketoconazole/ econazole shampoo
selenium sulfide
terbinafine gel
propylene glycol solution
how should the rx if pityriasis versicolor be applied
before bed for 3 days to 2 weels
when are oral antifungal agents intraconazoe and fluconazole used
when topical antifungal agents fail
what aids topical antifungal agents effectivness
heavy excercisse to promote sweating of the med onto skin surface
does pityriasis reccur
yes especially during summer even if previously eradicated
white scales can prevail even after causative agent malassezia is eradicated
