Review Question - QID 109201

A 41-year-old Hispanic male presents to the emergency room complaining of heartburn. He does not have a primary care provider and has not seen a physician in over ten years. He reports gradually worsening retrosternal pain that has also been accompanied by painful and difficult swallowing for the past 3 months. He has also lost 15 pounds over the past 6 months without a change in diet or exercise patterns. The patient has a history of intravenous drug use but reports that he has been clean for the past two years. He was previously homeless for several years and was briefly incarcerated for drug possession. He has a 20-pack-year smoking history. He used to drink alcohol heavily but has been sober for the past two years. His temperature is 100.5°F (38.1°C), blood pressure is 130/85 mmHg, pulse is 90/min, and respirations are 20/min. Multiple imaging and lab tests are ordered. A double-contrast esophageal barium study is shown in Figure A. This patient should be tested for which of the following pathogens?