13. A 32-year-old woman was recently diagnosed with a urinar…
13. A 32-year-old woman was recently diagnosed with a urinary tract infection and prescribed trimethoprim-sulfamethoxazole (TMP-SMX). Three days later she returned to the hospital with complaints of fever, flu-like symptoms, and a new purpuric rash that started on her face and is now beginning to slough. What is the most likely cause of her symptoms?