Updated on November 6, 2024 Overview ConditionDescriptionErysipelasSuperficial infection of the upper layers of the dermis. Raised sharply demarcated edges, rapid spread and onset, and fever early in course. Caused by Streptococcus pyogenes.CellulitisInfection that involves the deeper dermis and subcutaneous tissue. Non-purulent and purulent types. Non-purulent is caused by Streptococcus pyogenes and MSSA. Purulent is caused...