A 14-year-old boy is brought to the office by his father due to an erythema between his toes of both feet. He is a long-distante runner and he has no prior medical health and takes no medications. Examination shows erythema and excoriations between the toes of both feet. Microscopy of skin scrapings from the rash is shown in the exhibit.
Which of the following antimicrobial drugs is likely to be the most effective against the pathogen causing this patient's condition?

Question

A 14-year-old boy is brought to the office by his father due to an erythema between his toes of both feet. He is a long-distante runner and he has no prior medical health and takes no medications. Examination shows erythema and excoriations between the toes of both feet.  Microscopy of skin scrapings from the rash is shown in the exhibit.  
Which of the following antimicrobial drugs is likely to be the most effective against the pathogen causing this patient's condition?

Quizplus · Accepted Answer

Eductional Objective: Tinea pedis is a superficial infection of the epidermis caused by dermatophytes (eg, Trichophyton rubrum).  It most often presents as a pruritic, erythematous rash between the toes that frequently extends along the sole.  Microscopy of skin scrapings shows branching hyphae.  Treatment options include a variety of topical antifungals (eg, clotrimazole), but not nystatin.

A 14-Year-Old Boy Is Brought to the Office by His