Cellulitis is a deep (epidermal/dermal) infection that may also involve subcutaneous tissue.
USMLE® Step 1 style questions USMLE
USMLE® Step 2 style questions USMLE
A 53-year-old woman, with a history of type II diabetes mellitus, comes to the emergency department with a two-day history of febrile illness and a progressive, red, painful rash on the left lower extremity. The affected area is warm and tender to the touch. There is no crepitus. The right leg appears to be unaffected. Which of the following is the most likely causative agent of this skin disease?