Skin Infections Flashcards
Tinea Description/Cause
Superficial mycosis caused by dermtophytes - microsporum, epidermophyton, trichophyton
Tinea Presentation
round scaly lesion
itchy
central clearing
scalp, body, foot, groin, nails
Tinea Rx
skin - terbinafine or topical ketoconazole/miconazole
scalp - griseofulvin or terbinafine
nails - terbinafine
Candida Presentation
RF inc. immunosuppression, Abx, steroid inhalers
pink and white patches, moist, satellite lesions
mouth, vagina, skin fold, toe web
Candida Rx
Mouth - nystatin
Vagina - clotrimazole cream and pessary
Pityriasis versicolour presentation
Caused by malassezia furfur common in hot and humid environments circular hypo-/hyperpigmented patches fine white scale itchy back of neck and trunk
Pityriasis versicolour Ix/Rx
‘Spaghetti and meatballs’ appearance w/ KOH stain
selenium sulphate or ketoconazole shampoos
Impetigo Presentation
contagious superficial skin rash caused by S. aureus
age - peak at 2-5yo
honey-coloured crusts on erythematous base
common on face
Impetigo Rx
mild - topical Abx (fusidic acid, mupirocin)
more severe - flucloxacillin PO
Erysipelas overview
sharply defined superficial infection by S. pyogenes
often affects the face
high fever and increase WCC
Rx - benzylpenicillin IV, phenyloxymethylpenicillin (AKA penicillin V) and flucloxacillin PO
Cellulitis - what is it?
acute infection of skin and soft tissues
causes - beta-haemolytic strep and staph. aureus
Cellulitis presentation
deeper and less well defined than erysipelas
pain, swelling, erythema and warmth
systemic upset
+/- lymphadenopathy
Cellulitis Rx
Empiric - flucoxicillin IV
confirmed strep - benzylpenicillin or phenyloxymethylpenicillin
penicillin allergy - clindamycin
Warts overview
caused by HPV infection
Rx - expectant, destructive (topical salicyclic acid, cryotherapy, podophyllin, imiquimoid)
Molluscum overview
pox virus
pink papules w/ umbilicated central punctum
resolve spontaneously
