Skin Infections and Infestations
Fungal Infections
Tinea pedis
Tinea pedis
Tinea corporis
Tinea faciei
Tinea capitis
Onychomycosis
| Superficial Fungal Infections | Dermatophytes are main cause of fungal infections of hair,
nail, and skin Characterized by red, scaling patches with central clearing on the skin Occasional pustules or vesicles with surrounding scale Dystrophic nails (yellow, brittle, thickened); and short broken hairs |
Examples of causative agents: |
Trichophyton rubum, Trichophyton mentagrophytes, Microsporum canis, Epidermophyton floccosum |
| Diagnosis: | KOH examination, Wood's Light, culture |
Blastomycosis
Blastomycosis
Blastomycosis
Blastomycosis
Blastomycosis
Sporotrichosis
| Deep Fungal Infections | Capable of infecting both skin and other systems (e.g. lymphatics, lung) Skin lesions may be papules, nodules, or ulcers with crusts |
| Examples: | Blastomyces dermatitidis, Coccidioides immitis, Sporotrichosis (Sporothrix schenckii) |
| Diagnosis: | KOH, histology, culture |
Candida
Candida
Candida
Candida
Tinea versicolor
| Candidiasis (Candida albicans) | Oral Skin and genital mucosa Paronychia Onychomycosis Congenital Systemic Chronic mucocutaneous disease |
| Cryptococcosis (Cryptococcus neoformans) | Cutaneous lesions may be seen in immunocompromised host May appear like mollusca contagiosa Diagnosis by KOH, histology, culture |
| Tinea versicolor (Pityrosporum ovale)
|
Associated with pathogenesis of seborrheic dermatitis,
pityrosporum folliculitis Diagnosis by KOH, culture |
