Approach to HBsAg-Positive Patients
Last updated: March 21, 2013
A 24-year-old Asian man presents for evaluation of a positive blood test for hepatitis B surface antigen (HBsAg), detected when he went to donate blood during a college blood drive. Further tests show the patient has normal hepatic transaminase levels and a normal bilirubin. The patient was born in China and immigrated to the United States with his family when he was 15 years old. He is otherwise healthy and takes no medications. He has recently begun having sex with his girlfriend of 3 months. He has previously had one other sex partner.
Which of the following describes the most appropriate initial laboratory evaluation of this patient?