erysipelas.docx

erysipelas.docx - Learning Issue: erysipelas EL Definition...

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Learning Issue: erysipelas EL Definition Superficial form of cellulitis caused by infection of the upper dermis and superficial lymphatics that occurs most commonly on the legs (85% of cases) but also occurs on the cheek Caused by β-hemolytic streptococci (majority from Streptococcus pyogenes ). Also from MSSA or MRSA in high risk populations Also called “St.Anthony’s fire” Etiology Bacterial inoculation into area of skin trauma (ulcerations, inflammatory dermatoses, insect bites, surgical incisions) In facial erysipelas, the bacteria is usually from the host’s nasopharynx Predisposing factors: diabetes, alcoholism, HIV, nephrotic syndrome Risk factors: preexisting lymphedema (ie from breast cancer tx), subclinical lymphatic destruction Infection rapidly invades and spreads through the lymphatic system, causing skin streaking, regional lymph node swelling and tenderness Epidemiology F>M, but occurs earlier in life for males possibly due to more aggressive
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erysipelas.docx - Learning Issue: erysipelas EL Definition...

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