Fungal Skin Infections - Learning - Homelearning.ufs.ac.za/INTERNAL_MEDICINE_ON/Resources/3....
Transcript of Fungal Skin Infections - Learning - Homelearning.ufs.ac.za/INTERNAL_MEDICINE_ON/Resources/3....
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Fungal Skin Infections
Prof Werner Sinclair
Dept of Dermatology
University of the Free State
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Fungi That Infect The Skin
Dermatophytes
Yeasts: Candida
Pityrosporum (Mallesazia)
Moulds: Scopulariopsis
Scytalidium
etc.
Deep Fungi: Sporothrix schenkii
Cryptococcus neoformans
Histoplasma capsulatum
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Dermatophyte Infections
Keratolytic fungi
Trichophyton, Epidermophyton, Microsporum spp
Named according to skin area involved
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Diagnosis of Tinea
Clinical
KOH microscopy
Culture
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Treatment of Tinea Infections
Topical: Imidazole preparations
Terbinafine
Systemic: Griseofulvin
Terbinafine
Ketoconazole
Itraconazole
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Tinea Corporis
Classical ringworm
Annular lesions
Secondary rings
Edge: Raised, red, scaly, pustular, vesicular
Tinea incognito
Diagnosis
Treatment
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Tinea Capitis
Children / Immunocompromised adults
Scaling
Hair loss / broken off hairs
Pustules
Swelling, redness (kerion)
Diagnosis
Treatment: Always systemic!!!
Griseofulvin 15mg/kg/day
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Tinea Cruris
Any skin fold: Groin, axilla, submammary
May be annular, not necessarily
Little scaling
Can be very subtle
Treatment
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Tinea Pedis
Asymmetrical foot involvement
Four forms: interdigital
vesicular
moccasin
annular plaque
Epidemiology
Treatment
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Tinea Unguium
Random, asymmetric nail involvement
Hands and/or feet
Onycholysis
Subungual hyperkeratosis
Nail plate thickened, brittle, yellow
Secondary Pseudomonas
Treatment: Look for matrix involvement (lunula)
Hands: 2 months, feet 3 months
Preventative measures
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Candida Infections
Skin folds: Angular stomatitis
Genitals (Penis, scrotum, vulva)
Submammary
Axillae
Interdigital
Diaper rash
Nails
Mucous membranes: Oral
Vagina, penis
Esophagus
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CANDIDIASE
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Angular Stomatitis
“Perleche”
Older people
Atrophied gingival ridges
Ill-fitting / worn dentures
Candida colonizes the dentures
Treatment
Sterilize dentures
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Stomatitis
Tongue and rest of oral mucosa
White deposition, can be scraped off
Also red, smooth form
HIV, antibiotics, diabetics, babies
Diagnosis
Treatment
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Candidiasis
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Candidiasis
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Candida Intertrigo
All skin fold infections, including genitals
Very pruritic, red, scaling edge, satellite lesions
Usually symmetrical
Remember involvement of scrotum and penis
Diagnosis
Treatment
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CANDIDIASE
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CANDIDIASE
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CANDIDIASE
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CANDIDIASE
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Candida Diaper Rash
Usually secondary to PIND
Sometimes primary, antibiotics
Intertrigo, but more extensive
Treatment: Topical + Nystatin drops
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Candida Nail Infection
Random, asymmetrical involvement
Chronic paronychia
Nails hard, brown, slightly irregular
HIV, diabetics, wet work, soap, frequent hand
washing
Treatment
Advice
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CANDIDIASE
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Pityrosporum ovale
Also known as Mallesazia furfur
Causes tinea (pityriasis) versicolor
Also major role in seborrheic dermatitis
Not contagious
Treatment
Prophylaxis
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