–Erysipelas is a sharply demarcated superficial dermal bacterial infection, most often caused by invasion of the superficial lymphatics by β-hemolytic group A streptococci (Streptococcus pyogenes) and rarely by S.aureus
-The most common areas of infection: Legs, followed by the face
-The most common ages affected: Infants and elderly adults
-The lesions are red, raised, rapidly advancing with sharply demarcated margins between involved and normal tissues
-Lesions are painful with bright red edematous indurated appearance giving rise to “peau d’orange” appearance.
-Facial lesions can have ‘butterfly’ pattern
-Milian ear sign: Complete involvement of the ear by erysipelas
-Nearly always unilateral
Erysipelas vs.Cellulitis: Erysipelas is painful, raised, indurated plaque with sharply demarcated margins. It is superficial.
Cellulitis may present with or without purulence