A 36-year-old man presents to the ED with fever and night sweats having returned from Sri Lanka 8 days ago. His vital signs are :

  • HR 110
  • BP 108/62
  • RR 22
  • Sats 97% RA
  • Temp 38.8°C

1. List (4) important differential diagnoses for this presentation, and for each, one specific diagnostic investigation. 8 marks

2. List (4) key features you would specifically seek in the clinical history with brief justification. 4 marks