Final answer:
Erysipelas is a bacterial skin infection caused by S. pyogenes that typically presents as a raised red area on the legs or face, treated primarily with penicillin or alternative antibiotics like erythromycin.
Step-by-step explanation:
Erysipelas is a skin infection caused by the bacterium Streptococcus pyogenes (S. pyogenes), commonly affecting the upper dermis and superficial lymphatics, often characterized by an area of redness that tends to be raised, with well-defined edges. The common locations for erysipelas are the legs and face. The standard treatment (Tx) for erysipelas involves antibiotics, with penicillin being commonly prescribed because resistance is not widespread in streptococci at this time. For those allergic to penicillin, alternative antibiotics such as erythromycin may be used. In addition to medications, supportive care such as elevation of the infected area, cool wet compresses, and rest may be recommended to alleviate symptoms.