MRCP2-2446
A 32-year-old male presents to the emergency department with complaints of shortness of breath. He has been feeling unwell for the past week with a headache, malaise, and lethargy. He felt breathless this afternoon, which prompted his visit. During the review of his symptoms, he also mentions experiencing general abdominal pain and diarrhea yesterday. He is generally healthy, does not take any regular medications, and is a non-smoker. He admits to drinking one or two beers every evening and occasionally more on weekends. He is a high school teacher and lives with his wife and two young children, none of whom have been unwell recently. Upon examination, he has a temperature of 38.9ºC, a heart rate of 105 beats/minute, and a blood pressure of 105/70 mmHg. His respiratory rate is 26 breaths/minute, and his oxygen saturation is 92% breathing room air. A few crepitations bibasally are heard upon auscultation of his chest. Routine blood tests are performed, revealing the following results:
Hb 109 g/L
MCV 105 fL
Platelets 390 * 109/L
WBC 16.5 * 109/L
CRP 240 mg/L
Bilirubin 50 µmol/L
ALT 40 u/L
ALP 135 u/L
What is the most likely diagnosis?