+HBsAg indicates?

+HBsAg indicates?

• A. Potentially infectious carrier state
• B. Immunity after vaccination
• C. Past resolved infection
• D. Acute liver failure

Answer: (A)

HBsAg, the hepatitis B surface antigen, being present means there is an active hepatitis B virus infection and the person is contagious. This marker shows current infection, which can be either acute or chronic, and it indicates infectiousness to others. Immunity after vaccination is indicated by the presence of anti-HBs antibodies without detectable HBsAg. A past resolved infection would typically show anti-HBs and anti-HBc antibodies with HBsAg negative. Acute liver failure is not determined by the presence of HBsAg alone; it’s a potential severe complication of infection rather than a diagnostic marker of infectious status.

HBsAg, the hepatitis B surface antigen, being present means there is an active hepatitis B virus infection and the person is contagious. This marker shows current infection, which can be either acute or chronic, and it indicates infectiousness to others.

Immunity after vaccination is indicated by the presence of anti-HBs antibodies without detectable HBsAg. A past resolved infection would typically show anti-HBs and anti-HBc antibodies with HBsAg negative. Acute liver failure is not determined by the presence of HBsAg alone; it’s a potential severe complication of infection rather than a diagnostic marker of infectious status.