Clin Med U4L2 Infectious Disorders Bacterial and Dermatophytic

minimal inflammation cutaneous disorder

tinea (pityriasis) versicolor

what pathogen causes tinea (pityriasis) versicolor

Malesezia furfur, M. globasa

inflammatory response common in what cutaneous disorders

tinea capitis

tinea barbae

tinea faciei

tinea corporis

tinea cruris

tinea manuum

tinea pedis

cutaneous candidiasis

what pathogens cause the tineas

trichophyton

microsporum

epidermophyton spp.

what pathogen causes cutaneous candidiasis

candida albicans, other candida spp.

what is the most frequent form of human infection

dermatophytoses

what environments is dermatophytoses most common in

excessive sweating, use of occlusive footwear

who has increased risk for dermatophytoses

immunodeficient, DM, systemic corticosteroids or immunosuppresive meds

primarily occurs in children through household exposure (contaminated hats, brushes, barber instruments)

men have more tinea ___ than women

pedis, cruris, unguium

fungal infections group 1

superficial, limited to stratum corneum, hair and nails

specific to location

tinea corporis description

annular lesions

scaling

vesicles

pustules

tinea corporis key features

spreads centrifugally from point of invasion with central clearing

tinea corporis symptoms

pruritis and burning

tinea capitis description

non-inflammatory scaling

severe pustular reaction with alopecia (kerion)

tinea capitis key features

black dot tinea due to hair breakage near the scalp

scaly patches

cervical LAD/swelling

tinea capitis unique considerations

alopecia with or without scale is most common presentation

treat household contacts

tinea cruris description

sharply demarcated raised erythematous scaling with advancing border

with or without pustules

spares the scrotum

tinea cruris symptoms

pruritis

tinea manus description

dorsum similar to body

palm and interdigit spaces with fissures, erythema and maceration

tinea manus key features

no response to emollients

tinea manus symptoms

pruritis, xerosis

tinea pedis description

diffuse scaling on feet and hand

maceration between digits

tinea pedis key features

one hand 2 feet

tinea pedis symptoms

pruritic

erosions

ulcers

tinea pedis special consideration

most common location for dermatophyte infections

tinea unguium / onychomycosis description

hyperkeratosis of the nail bed

yellowing and thickening of distal nail plate

tinea unguium / onychomycosis key features

frequent recurrences

tinea unguium / onychomycosis special considerations

M > F

trauma

Toenail > fingernail

must tx 6-12 weeks and use specific agent for specific nails