Flashcards in Fungal Skin Infections Deck (53)
What are all the skin infections?
tinea capitis (ringworm of the scalp)
tinea corporis (ringworm of glabrous skin)
tinea cruris (ringworm of the groin)
tinea unguium or onychomycosis (ringworm of the nail)
tinea pedis (ringworm of the feet)
tinea barbae (ringworm of the beard)
tinea manuum (ringworm of the hand)
What is ringworm of scalp?
What is ringworm of glabrous skin?
What is ringworm in groin?
What is ringworm of nail?
tinea unguium or onychomycosis
What is ringworm of the feet?
What is ringworm of the beard?
What is ringworm of the hand?
What is Superficial fungal infection of the skin of the scalp, eyebrows, and eyelashes, with a propensity for attacking hair shafts and follicles?
What causes this?
What are the three genres?
microsporum, trichophyton, epidermophyton
What is the dx for dermatophytes?
KOH mount, see branching hyphae
What else can you use to dx dermatophytes?
cultures - take long time
Where do dermatophytes survive?
keratin, hair, nails
Who gets tinea capitus?
children 3-10 yo
What is the cause of tinea capitus?
How do you get tinea capitus?
person to person contact, orangism is viable on contaminated brushes, combs, sheets
What is the presentation of tinea capitus?
non-inflammatory- patches of alopecia, scaling
Inflammatory - granulomatus, boggy mass
How does tinea capitus progress?
red papules --> grayish ring --> pustules --> debris --> alopecia
How do you dx tinea capitus?
KOH mount, wood lamp (the most common does not fluorescence), cultures (2 wk to identify)
What is the tx for tinea capitus?
Griseofluvin 20-25 mg/kg/d for 6-8 wks
Itraconazole 3-5 mg/kg/d with a full meal for 4-6 wks
terbinafine 3-6 mg/kg/d for approximately 2-4 weeks
Selenium sulfide shampoo
How does selenium sulfide shampoo help with tinea capitus?
reduces viable spores, reduce spreading
What does tinea corporis look like?
annular lesions, scaly ring like, advances elevated borders, central clearing, deep inflammatory lesion
What causes tinea corporis?
zoophilic or geophilic dermatophytes
What is trichophyton rubum cause?
infection of hair, hair follicles, surrounding dermis, perifollicular granulomatous nodules
How do you dx tinea corporis?
KOH test, skin scrapings, fungal cultures
What is the treatment for tinea corporis?
Naftifine 1% cream/gel (Naftin) x 4 weeks
Terbinafine topical (Lamisil)
Ketoconazole topical (Nizoral)
Clotrimazole 1% cream (Mycelex, Lotrimin)
Oxiconazole 1% cream (Oxistat)
How should the topical be applied in tinea corporis?
at least 2 cm beyond area once or twice a day for at least 2 weeks
What are the systemic agents of tinea corporis?
for extensive infection, immunosuppression, resistance to topicals, or comorbid tineas
GRISEOFULVIN 10mg/kg/d for 4 weeks
FLUCONAZOLE 50-100mg/d or 150mg once weekly for 2-4 weeks
ITRACONAZOLE 200mg/d x 1 week, or 100mg/d x 2 weeks