USMLE® Step 1 style questions USMLE
A 38-year-old previously healthy man is referred to the office for the evaluation of pleuritic chest pain. His medical history is only relevant to a recent trip to South America. Upon medical interrogation, the patient denies abdominal pain or gastrointestinal disturbances. Shortly after his return, he started with an episode of wheezing and dyspnea, pleuritic chest pain, and productive cough with rusty colored sputum. The patient claims that this episode was short lived and resolved on its own. Physical examination reveals inspiratory crackles and a mild rash over his chest. Laboratory tests show a moderate eosinophilia (3400/mm³). Which of the following is the most likely causal organism?