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23 Cards in this Set
- Front
- Back
three types of fungal diseases
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mycotoxicoses
hypersensitivity diseases colonization/infection |
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fungal infections of the stratum corneum w/ little or no inflammatory response
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superficial mycoses
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4 types of superficial mycoses
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tinea (pityriasis) versicolor
tinea nigra black piedra white piedra |
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brown/black macules on palms and/or soles
superficial and asymptomatic no host immune response caused by Exophiala wernickii |
Tinea Nigra
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scaly hypo- or hyperpigmented patches on neck, torso, and limbs
infection largely cosmetic caused by Malassezia furfur |
Tinea (pityriasis) versicolor
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superficial fungal infection that appears as cream, yellow or beige nodules along the hair shaft
caused by Trichosporon sp. |
White piedra
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fungal infection of scalp hair causing hard, gritty, brown/black nodules firmly attached to hair shaft
caused by Piedraia hortae |
black piedra
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three genera of dermatophytes
they produce keratinase transmission can be anthropophilic, zoophilic, or geophilic |
Trichophyton
Microsporum Epidermophyton |
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infection that is commonly called ringworm
caused by dermatophyte fungi |
tinea
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dermatophytosis of the glabrous skin of the face, trunk, and limbs
zoophilic and geophilic varieties are apt to cause inflammatory lesions prevalent in warm, humid climates |
tinea corporis (ringworm of body)
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dermatophytosis of the plantar surface of the feet and toe webs
most common pathogens are T. rubrum and T. mentagrophytes |
tinea pedis (athlete's foot)
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dermatophytosis of the medial upper thighs and the inguinal, pubic, perineal, and perianal areas
most common pathogen is T. rubrum |
tinea cruris (jock itch)
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hyphal invasion of scalp spreads to hair follicle
caused by Microsporum and Trichophyton species acute inflammation of hair follicle (favus) |
tinea capitis
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dermatophytosis of the facial beard area of men
most common agents are T. mentagrophytes and T. verrucosum |
tinea barbae
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common pathogen involved in fungal infection of the nail (tinea unguim)
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Trichophyton rubrum
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most common locations for subcutaneous mycoses
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hands, feet, arms, legs
introduction following trauma |
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fungus found in soil, introduced into skin following trauma (eg. rose thorn)
causes chronic nodular and ulcerative lesions bug? |
lymphocutaneous sporothrichosis
Sporothrix schenckii |
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chronic, localized cutaneous to subcutaneous infection causing warty nodules at inoculation site w/ "cauliflower like" appearance
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chromoblastomycosis
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fungal infections that fluoresce under UV light during Wood's lamp exam
2 other tests used in diagnosis of superficial and cutaneous mycoses |
Microsporum spp.
KOH prep and culture |
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treatment of superficial mycoses
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treat w/ topical agents (cream or shampoo)
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characteristic triad of indurated swelling, multiple sinus tracts, and localization on foot
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mycetoma
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treatment of cutaneous mycoses:
1) tinea corporis 2) tinea capitis and barbae 3) onychomycosis 4) hair infections |
1) topical allylamines
2) systemic treatment 3) systemic treatment 4) oral griseofulvin |
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treatment of subcutaneous mycoses:
1) sporotrichosis 2) chromomycosis 3) mycetoma |
1) saturated solution of KI
2) 5-fluorocytosine 3) varies (amphothericin B or aoles) |