lecture 5 common skin infections marcella debeck
TRANSCRIPT
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Lecture 5Common Skin Infections
Marcella Debeck
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Common Skin Infections
Impetigo Ecthyma Folliculitis Erysipelas Necrotising fasciitis Erythrasma Pitted Keratolysis Cellulitis onychomycosis
Lymphaginitis Molloscum Contagiosum Verrucae Herpes simplex Herpes zoster Dermatophyte infections candida albican infection
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Impetigo
Superficial skin infection due to staphylococci or streptococci
infections Contagious blisters which rupture leaving yellow
crusted exudate Two types
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Bullous Impetigo
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Ecthyma
Strep. Or Staph. Infection circumscribed, ulcerated and crusted lesions heal with scarring mostly in legs
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Ecthyma
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Folliculitis
Infection of the hair follicles any hairy area
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Erysipelas
Dermal infection May be accompanied by systemic
symptoms - malaise, shivering, fever well defined advancing edge AKA St Anthony’s fire
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Erysipelas
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Necrotising fascitis
very serious bacterial infection of the superficial fascia progresses very quickly
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Erythrasma
Dry, reddish brown, slightly scaly and asymptomatic eruption
wood’s light - coral-pink imidazole cream, oral ab’s, fusidic acid Toe webs
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Dockery, G.L. (1997).Cutaneous Disorders of the lower extremity. Phila
delphia:WB Saunders
Slide 2
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Pitted Keratolysis
maloderous, pitted erosions and discoloured areas.
cornebacterium
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Cellulitis
Infection of the subcutaneous tissues deeper and more extensive than erysipelas systemic symptoms swelling, redness, and local pain antibiotics
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Lymphaginitis
inflammation of the lymph vessels appearance of a red line that follows the blood vessels up the leg
Lymphadenitis - inflammation of the lymph nodes
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Molluscum contagiosum
discrete pearly, pink, umbilicated dome shaped papules
DNA pox virus contain a cheesy material face, neck and trunk usually multiple and grouped
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Verrucae Vs Corns
Rapid Onset Slow growing
Any site Sites of compressionand friction
Young Middle aged and older
Superficialcappillaries whichbleed easily
Capillary bleeding israre
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Herpes Simplex
Acute vesicular eruption two virus types reoccurence Differential diagnosis: impetigo
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Herpes
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Dockery, G.L. (1997).Cutaneous Disorders of the lower extremity. Philadelphia:WB Saunders
Slide 3
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Herpes Zoster
Varicella zoster virus Dermatomal distribution Post herpetic neuralgia rest, analgesia, drying lotions acyclovar and prednisone
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Gawkrodger, D. J. (1992) Dermatology. London: Churchill Livingstone
Slide 7
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Dermatophyte infections
Microsporum Trichopyton Epidermophyton Form hyphae Tinea Pedis: T.rubrum, Tmentagrophytes
var interdigitale, Epidermophyton floccosum
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Dermatophyte infections
Differential diagnosis:– Psoriasis– Contact dermatitis– erythrasma
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Tinea pedis
Interdigital moccasin acute vesicular
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Interdigital tinea pedis
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Gawkrodger, D. J. (1992) Dermatology. London: Churchill Livingstone
Slide 3
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Tinea pedis
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Candida albicans infections
yeasts intertrigo paronychia Differential diagnosis (intertrigo)
– Psoriasis, seborrhoeic dermatitis, bacterial seconadary infection
Differential diagnosis (Paronychia):– bacterial infection, chronic eczema:
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Dockery, G.L. (1997).Cutaneous Disorders of the lower extremity. Philadelphia:WB Saunders
Slide 1
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Candida Paronychia
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Onychomycosis
Fungal Infection of the nails generally dermatophyte occasionally mould or candiida Four types:
– distal and lateral subungual– superficial white– proximal subungual– total dystrophic
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Gawkrodger, D. J. (1992) Dermatology. London: Churchill Livingstone
Slide 7