12th May 2024

A 43-year-old woman presents with abdominal discomfort, nausea, and a general feeling of malaise.

A 43-year-old woman presents with abdominal discomfort, nausea, and a general feeling of malaise. She mentions that her skin and the whites of her eyes have turned yellow. She has no history of drug use or blood transfusions but does report unprotected sexual contact with a new partner a few months ago. Blood tests reveal elevated liver enzymes and the presence of HBsAg and HBeAg.

Which is the most likely causative organism?