30th April 2024

A 25-year-old woman presents with a one-week history of nausea, vomiting, and general malaise.

A 25-year-old woman presents with a one-week history of nausea, vomiting, and general malaise. She reports a loss of appetite and mild abdominal discomfort. She has not travelled recently but recalls eating at a local restaurant known for its exotic cuisines. On examination, she appears fatigued, and her sclerae are icteric. There is mild tenderness in her right upper quadrant, but no hepatomegaly is noted.

Investigations:

Pulse Rate: 72 bpm

Blood Pressure: 110/70 mmHg

Physical Examination: Mild right upper quadrant tenderness, icteric sclerae

Which is the most appropriate diagnostic investigation?