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?

I would recommend this module to a peer or student:


The online modules increased your ability to visually recognize skin disease:


Please use the space below to provide us with feedback about strengths of this module.


Please use the space below to share any opportunities for improvement for this module.