Chronic hepatitis B serologic status is determined by a pattern showing HBsAg positive, IgG anti-HBc positive, IgM anti-HBc negative, and anti-HBs negative. Which status does this pattern correspond to?

Chronic hepatitis B serologic status is determined by a pattern showing HBsAg positive, IgG anti-HBc positive, IgM anti-HBc negative, and anti-HBs negative. Which status does this pattern correspond to?

• A. Acute hepatitis B infection
• B. Chronic hepatitis B infection
• C. Past resolved infection
• D. Immune due to vaccination

Answer: (D)

This pattern shows an ongoing hepatitis B infection with prior exposure, not immunity. HBsAg positive means the virus is present and the infection is active. The IgG anti-HBc positivity indicates prior exposure and is typical of a longer-standing infection, while the absence of IgM anti-HBc argues against an acute, new infection. Anti-HBs being negative means there is no protective surface antibody, which rules out immunity from vaccination or recovery with developed anti-HBs. In vaccination, you’d expect anti-HBs positive and anti-HBc negative because the vaccine does not include HBc antigen. In past resolved infection, HBsAg would be negative and anti-HBs would often be positive. In this combination, the finding aligns with chronic hepatitis B infection.

This pattern shows an ongoing hepatitis B infection with prior exposure, not immunity. HBsAg positive means the virus is present and the infection is active. The IgG anti-HBc positivity indicates prior exposure and is typical of a longer-standing infection, while the absence of IgM anti-HBc argues against an acute, new infection. Anti-HBs being negative means there is no protective surface antibody, which rules out immunity from vaccination or recovery with developed anti-HBs. In vaccination, you’d expect anti-HBs positive and anti-HBc negative because the vaccine does not include HBc antigen. In past resolved infection, HBsAg would be negative and anti-HBs would often be positive. In this combination, the finding aligns with chronic hepatitis B infection.