What is a defining feature of erysipelas?

A defining feature of erysipelas is that it involves lymphatic involvement and is more superficial than cellulitis. Erysipelas is specifically characterized by a well-defined raised border and is primarily located within the upper layers of the skin, making it distinct from cellulitis, which is a deeper tissue infection. This condition is usually caused by beta-hemolytic streptococci and typically presents with an acute onset of symptoms, including fever and chills, along with the characteristic bright red, firm, and painful erythematous area on the skin.

The involvement of lymphatics can lead to lymphadenopathy, and the visibility of the demarcation between healthy tissue and the infected area is a hallmark of erysipelas. Recognizing these features helps differentiate it from other skin infections. Antibiotics are effective in treating erysipelas, further emphasizing the importance of understanding its pathology and treatment response in a clinical setting.