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kavinashah
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how do you describe impetigo?
scaly rash with golden crusting
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what Ix do you do if suspect impetigo?
swab
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what are most common causes of impetigo?
- staph aureus
- strep pyogenes (GAS)
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what is Rx of impetigo?
- flucloxacillin and penicillin - systemic
- topical: potassium permanganate soaks and topical antibiotics
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what is the diagnosis if there is erythema running up the leg and painful lymphoedema?
ascending lymphangitis (usually strep)
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what is Rx of cellulitis?
- flucloxacillin 1g qds iv
- and penicilin g 1g qds iv
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what is erysipelas? - features
- superficial infection
- well defined edge
- face, legs
- malaise, fever
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what is cause of erysipelas?
strep pyogenes
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what is Rx of erysipelas?
penicillin G 1g qds
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which part of the body do fungal infections affect children mainly?
scalp = tinea capitis
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what part of body do fungal infections affect adults?
intertriginous regions
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which Ix do you do to confirm fungal infection?
scrape
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what is fungal infection of groin called?
tinea cruris
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what do fungal infection of skin look like?
- annular, serpininous edge
- scaly
- red, expanding outwards
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what are Rx options of fungal skin infection?
- ketoconazole/itraconazole
- terbinafine
- griseofulvin
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what is Rx for tinea capitis?
ORAL
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if there are multiple macules of hypopigmentation on the back, what is that called/due to?
pityriasis versicolor
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what is pityriasis caused by?
yeast infection
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what is main feature of pityriasis versicolor?
- variably pigmented patches, fine scale
- trunk
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what are predisposing factors for pityriasis versicolor?
- high humidity
- high rate of sebum production
- elevated cortisol eg prolonged steroids
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what is Rx for pityriasis versicolor?
- ketoconazole shampoo only if pt wants to
- or selenium sulphide
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what is time scale of pityriasis versicolor?
chronic
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what are symptoms of pityriasis versicolor?
asymptomatic
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what is Rx of head /body lice?
malathion
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what causes reactions to insect bites?
immunologically mediated
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what is main feature of reaction to insect bite?
very pruritic
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what is treatment of reaction to insect bite?
- treat pets
- spray home with insecticide eg malathion
- corticosteroids
- antibmicrobial for secondary infection
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how is scabies spread??
prolonged skin contact - hand hold, sex, share bed
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what is main symptom of scabies?
itching
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where on body does scabies affect?
- intraepidermal burrows
- hands, wrists, shaft of penis
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what is Rx of scabies?
- permethrin or malathion
- wash all bedding and clothes
- treat all household at same time
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what causes HSV to recur?
- skin immunosuppression eg UV radiation
- altered hormone mileu - menstruation
- fever
- common cold
- altered immune states
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what is the skin lesion of HSV usually described as?
grouped vesicles (clusters) on an erythematous base
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what Ix do you do if suspect HSV?
viral PCR from swab
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what is Rx of HSV skin infection?
acyclovir oral/iv
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how do you describe the rash of varicella?
- papules and vesicles
- generalised
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how do you describe the rash of zoster
- vesicles, cropped, clusters
- dermatomal
- painful
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what is complication of zoster?
post herpetic neuralgia
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purple plaques on the face of a young man, what could that be?
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how do you describe molluscum contagious?
umbilicated skin coloured papulessssssss
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who is at risk of molluscum?
- children/atopy
- sexually active
- HIV infected
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what is Rx of molluscum?
- self limiting so no treatment usually
- can do cryo
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