Fungal Flashcards
Causative agent of Tinea versicolor
Malassezia furfur
Malassezia globosa
Tinea versicolor is common among
Young men at lipid rich areas due to high sebaceous glands activity.
Tinea versicolor is superficial, epidermal or opportunistic?
Superficial- infection limited to outmost layers of skin and hair.
Malassezia furfur / Malassezia globosa ‘s microscopic features?
Short, stubby, unbranched hyphae and budding yeasts in stratum corneum- sphagetti & meatball
Direct examination with KOH & Parker ink to stain yeasts and pseudo mycelium blue.
Cutaneous mycoses-infections that extend deeper into epidermis, examples:
Microsporum spp.
Trichophyton spp. (Trichophyton rubrum , mentagrophytes, verrucosum)
Epidermophyton spp. (Epidermophyton floccosum)
Causative agent for Dermatophytosis / Tinea capitis
Microsporum spp
Trichophyton spp
Location of dermatophytosis/Tinea capitis
Scalp
Manifestation of dermatophytosis/Tinea capitis ?
Black dot
Dry scaly
Kerion/boggy swelling which later causes scarring
Favus (dry yellow crusts)
What treatment is recommended for dermatophytosis?
Systemic treatment
due to the thick stratum corneum in the sites make the penetration of topical medicines difficult
Tinea corporis/ringworms is due to
Microsporum spp
Trichopython spp
Epidermophyton spp
Tinea pedis/athlete’s foot is caused by
Trichophyton rubrum
Trichophyton mentagrophytes
(Systemic treatment)
Tinea cruris/ jock itch is due to
Trichophyton rubrum
Epidermophyton floccosum
Tinea unguium/onychomycosis on nails is due to
Tricho. rubrum, mentagrophytes
(Systemic treatment)
Tinea manuum is due to
Tricho. rubrum, mentagrophytes
Epidermophyton floccosum
Tinea barbae (at bearded area) is due to zoophilic dermatophytes
Tricho verrucosum, mentagrophytes
