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23 Cards in this Set

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  • Back
What bacteria(s) cause impetigo?
S. Aureus (some cases due to group A strep)
Clinical signs of impetigo?
One or more skin lesions
Honey coloured crustingOftern around nose and mouth
Regional lymph nodes
Bullae due to toxin production
Rx of impetigo?
Topical mupurocin if localised
Oral fluclox for 7-10days
Use own towel, bathe seperately (children!)
Complications of impetigo?
Staph-scaleded skin syndrome
Strep-uritcaria, scarlet fever, glomerlulnephritis, erythema multiform
Define ecthyma
Chronic infection of skin with crusting behind which is ulceration
What bacteria(s) cause ecthyma?
Mix of S. aureus and Group A strep
Does ecthyma scar?
Usually
Common sites of ecthyma?
Bum, thighs, lower leg, face.
Rx of ecthyma?
14 days high dose oral erythromycin or fluclox
Clindamycin may be used due to good tissue penetration
Define cellulitis.
Acute, subacute or chronic infection of loose connective tissue
What bacteria(s) cause cellulitis?
Group A streps.
Staph aurues may be found in combination with group A strep
Clinical signs of cellulitis?
Fever, malaise, systemic upset
Affected limb hot, painful and tender
Where is cellulitis usually situated?
Lower limb
Underlying causes of cellulitis?
Insect bite, trauma,tinea pedis or ulceration
Complications of cellulitis?
Blistering
Extends into deep dermis causeing necrotising fasciitis
Subcutaneous absecess
lymphoedema
septicaemia
myocarditis
renal failure
Rx of necrotisinf fasciitis?
Urgant debridement
high dose IV antibiotics
Ix of cellulitis?
Swab blisters or port of entry
WCC
CRP
ASO titre severl days after actue infection
Blood cultures (but rare to isolate causitive organism)
Rx of cellulitis?
High dose oral or IV benylpenicillin or fluclox for min 10-14days
Recurrent episodes-low dose penicillin prophylaxis
Define erysipelas
Infection of dermis and upper subcutaneous tissue associated with well defined edge reflecting dermal infection
Where does erysipelas commonly affect?
The face
What bacteria(s) cause erysipelas?
Group A strep
Very rarely S. aureus
Hib in young children esp <2years
Clinical signs of erysipelas?
Acute severe fever, malaise, well defined erythems of face which is tender
Ix of erysipelas
Nasal, throat, ear and conjunctival swabs of symptomatic there
FBC, blood cutures
search for port of entry