10 - Derm - Fungal infections - Dermatophyte infection Flashcards
three types of fungi able to multiply within keratinised tissue
microsporum
trichopyton
epidermophyton
5 types of tinea
tinea capitis - scalp tinea cruris - groin tinea pedis - athletes foot tinea corporis - body tinea unguium - nail
capitis - common in who? transmission?
kids - close contact, contaminated brushes, barbers instruments
clinical features of capitis
circular scaling patched with alopecia - may scar
pustules and crusting
severe> lymphadenopathic kerion (boggy purulent plaque)
capitis DDx
seborrheic eczema
discoid lupus erythematous
corporis - usually where? clinical features?
glabrous skin (hairless) asymmetrical itchy scaly plaque with red border and central clearing
corporis DDx
psoriasis
pityriasis rosea
pityriasis versicolor
cruris - (groin) - appearance? DDx?
well demarcated red plaques
ddx candidiasis (but no satellite lesions) psoriasis atopic eczema seborrheic eczema erythrasma
pedis - appearance and features?
diffuse scaly erythema of soles
may affect toe clefts (white and fissured)
pedis - complications
2ndary bact inf > cellulitis
autoeczematisation
unguium - appearance? DDx
yellow thickened nail, onchyolysis, hyperkeratosis
ddx - psoriasis, trauma, moulds
Ix for tinea
woods light - some species fluoresce green
skin scraping, nail clipping, scales for culture and microscopy
mgmt tinea - topical?
if localised uncomplicated tinea of body/flexures - micronazole cream, terbinafine cream
mgmt tinea - systemic indications
widespread infection, tinea pedis, tinea unguium, tinea capitis
tinea unguium mgmt
tinea capitis in children mgmt
TU - oral terbinafine
TCinC - oral griseofulvin for 6-8 weeks
