Dermatophyte and
Dermatophytosis
Tinea barbae / Tinea capitus: Prepubertal / Tinea capitus: Black dot /
Tinea favosa: Favus / Arthrodermas gypseum & Microsporum gypseum /
Tinea corporis / Tinea cruris / Tinea imbricata / Tinea manuum / Tinea pedis /
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| (right) Dermatophyte infection. The hyphal strands penetrate through the stratum corneum but do not invade the living cells of the epidermis. (left) Mycelium growing down a hair shaft to the bulb (Periodic acid--Schiff stain X400) |
| Tinea barbae: Ringworm of facial hair | |||
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| Topical, mild form | Pustular & abscessed form | Deep pustule folliailitus by T. verrucosum |
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| Tinea capitus: Prepubertal, gray patch, classical scalp ringworm, and epidemic ringworms. | |||
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| Caused by M. audouinii | Cuased by M. audouinii | Caused by unidentified Microsporum (Probably M. gypsium or M. canis because pustular and suppurative) | ||||
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| Caused by M. canis | M. canis on SABS (reverse and top), agent of gray patch | M. canis macroconidia, agent of gray patch |
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| M. audouinii on SDA, colony with pleomerphic sectors | M. gypseum, agent of gray patch | |||||
| Tinea capitus: Black dot ringworm | |||
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| By T. violaceum | T. violaceum | T. tonsurans | ||||
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| T. tonsurans (micro conidia in vitro) | T. tonsurans (micro and macro conidia) |
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| Tinea Favosa: Favus, a special kind of tinea capitus | |||
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| Seborrheic stage showing matted hair (infected hair is grey) | Advanced disease with alopecia and scarring | Massive crust of scutula, mycilium and scalp epithelium | ||||
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| T. schoenleinii | Ferdinand Bol's painting, "Four Governors of the Amsterdam Leper Asylum" | Trichophyton schoenleinii, cup-shaped scutula |
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| Arthrodermas gypseum: Telomorph | ||
| Microsporum gypseum: Anamorph |
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| On PDA (anamorph) | Mated strains in hair-soil culture | Gymnothecia on hair | ||||
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| Antheridia, ascogonia, and conidium | Gymnothecia on hair | Asci and ascospores (Asci prototunicate) | ||||
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| Microsporum canis (reverse and top) | M. canis holothallic conidia | Epidermophyton floccosum on PDA | ||||
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| E. floccosum holothallic conidia | Epidermophyton floccosum on PDA | T. tonsurans holoarthric conidia |
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| Tinea corporis: | |||
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| Infected skin scales & Parkers ink (bright field) | Treated with KOH (Phase-contrast) | |||
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| Lesion on chin (non-vesicular form) | Lesions on forhead & cheek (Non-vesicular form) |
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| Tinea cruris: Ringworm of groin and periannal regions | |||
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| Annular type of gluteal areas | Annular type on lower trunk | |||
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| Periannal type | Periannal type |
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| Tinea imbricata: Beauty ringworm | |||
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| Concentric rings over chest (Free edges of scales face inward) | Chronic scaling infection on legs of female |
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| Severe remission case on legs of male | T. concentricium |
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| Tinea manuum: | |||
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| By T. rubrum | By T. rubrum | By T. rubrum |
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| Tinea pedis: Athlete's foot | |||
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| Interdigital | Hyperkeratotic & erythrodermic | Mild children's form | ||||
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| Vesicular form | Deep hyperkeratotic form involving feet, toenails and legs | Caused by T. mentagrophytes | ||||
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| Dermatophytic pseudo-mycetoma caused by M. canis |
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| Tinea unguium: Dermatophytic onychomycosis | |||
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| (top) Advanced disease; (bottom) Infection at distal edges of nail plate | Groved hyperkerototic nails | |||
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| Toenail infections by T. rubrum | T. rubrum |
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