15- Fungi And Yeasts (Superficial) Flashcards
Black dot ringworm, seborrheic like scaling and inflammatory kerion
This organism in tinea capitis produces spores WITHIN the hair shaft
Do not produce fluorescence in Woodβs lamp
Trichophyton tonsurans
Organism in tinea capitis that produce spores OUTSIDE the hair shaft
Fluoresce under Woodβs lamp
Scaly, erythematous papules with loose and broken off hairs
Microsporum canis
Deep tender boggy plaques exuding pus in tinea capitis
Scarring, permanent alopecia
Kerion celsii
Appears chiefly on scalp but may affect glabrous skin and nails
Scalp- concave yellow sulfur crusts around loose wiry hairs
Atrophic scarring- glossy smooth white patch
Glabrous skin- cup shaped crusts with mousy odor
Favus
Cup shaped crusts usually pierced by a hair on skin with a distinctive mousy odor in tinea infection
Scutulae
Infected tinea hairs will fluoresce what color in Woodβs light?
Bright green or yellow green
Trichophyton- does not fluoresce
Treatment for tinea capitis in children
Griseofulvin 10mg/kg/day
2-4 months
Treatment for trichophyton infections in tinea
Terbinafine 3-6mg/kg/day x 1-4 weeks
Adjunct: selenium sulfide shampoo or ketoconazole shampoo 5 mins 3x a week
Tinea barbae is different from staphylococcal folliculitis (sycosis vulgaris) by
Sparing of upper lip
Unilateral involvement
Circular, sharply circumscribed, slightly erythematous, dry, scaly hypopigmented patches
Progressive central clearing
Found in the body except in face, scalp, beard, hands, feet and groin
Tinea corporis
Treatment for tinea corporis
Topical- miconazole, clotrimazole BID X 2-4 weeks
ketoconazole, terbinafine- OD
Terbinafine- 1 week
Systemic- trichophyton: griseofulvin, terbinafine, fluconazole
Deep pustular tinea circinata resembling a carbuncle or kerion on glabrous skin
Follicles distended with purulent material
Most often on shin or wrist
Fungal folliculitis
Majocchi granuloma
Tinea incognito is an atypical lesion that are widespread and may lack an advancing scaly border
It is usually caused by
Treatment with topical corticosteroid or calcineurin inhibitors
Infection of the nail plate by a fungus is called
Onychomycosis
Tinea unguium
Onychomycosis caused by what organism?
Starts at distal corner of the nail and involves the junction of the nail and bed
Yellow discoloration, spreads proximally
Nail becomes brittle
T. rubrum