A 27-Year-Old Man Comes to the Physician Because of a 3-Week

A 27-year-old man comes to the physician because of a 3-week history of generalized fatigue, mild malaise, abdominal pain. He attended the state fair over a month ago, where he tried a number of regional foods, and wonders if it might have been caused by something he ate. He has also noticed a dark urine. He drinks one to two beers daily. He has had several episodes of unprotected sex with different female partners within the past year. He works as a nursing assistant in a rehabilitation facility. He appears tired. Examination shows mild scleral icterus. The liver is palpated 2-3 cm below the right costal margin and is tender.Labroratory tests show elevated liver function tests. Which of the following is most likely to be present in this patient?

A) HAV in the stool
B) Serum anti-HAV IgM
C) Serum anti-HBsAg IgG
D) Serum HBsAg
E) Hepatitis C virus RNA viral load in blood
F) Serum anti-hepatitis D virus IgG