Excellence in Dermatology™
Excellence in Dermatologic Surgery™
Excellence in Medical Dermatology™
Excellence in Dermatopathology™

Bacterial Skin Infections


This patient has this eruption on his abdomen. He is a swimmer so extensively shaves his body hair and recently took antibiotics for a sinus infection. Which one of the features of this case is NOT a risk factor for methicillin-resistant Staph aureus (MRSA) infection?


Based on the morphologic features of this photo, what is the most likely diagnosis?

3.*A 18 year-old man has a new painful raised erythematous nodule on his knee that is fluctuant on palpation. What is the most appropriate management for this patient?
4.*What is the most likely etiology of this patient’s cellulitis?
5.*This 30-year old patient has a painful rash on his thigh. He works in construction and thinks this is where a piece of metal injured him a couple days ago. Over the past 24 hours the area is being more purple, spreading, and very painful. What is the most likely diagnosis?
6.*What is the most appropriate initial treatment for this patient?

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