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