What is the correct interpretation when HBsAg is neg, Anti-HBc is pos, and Anti-HBs is neg?

What is the correct interpretation when HBsAg is neg, Anti-HBc is pos, and Anti-HBs is neg?

• A. Acute infection
• B. Chronic infection
• C. Interpretation unclear
• D. Immune due to vaccination

Answer: (C)

The interpretation of HBsAg negative, Anti-HBc positive, and Anti-HBs negative signifies a prior exposure to the hepatitis B virus, but does not indicate either an active infection or immunity from vaccination. Specifically, the presence of Anti-HBc suggests that there has been past infection with the virus, but it is not clear whether this was an acute or chronic infection. The negative HBsAg means the virus is not currently active, and the absence of Anti-HBs indicates there is no protective antibody level, which contributes to the ambiguity. Therefore, this combination of serological markers indicates that while there has been an infection at some point, the current status isn’t defined clearly enough to categorize it neatly into acute or chronic. Hence, interpreting these serological results as unclear aligns with the characteristics of the specific markers present.

The interpretation of HBsAg negative, Anti-HBc positive, and Anti-HBs negative signifies a prior exposure to the hepatitis B virus, but does not indicate either an active infection or immunity from vaccination. Specifically, the presence of Anti-HBc suggests that there has been past infection with the virus, but it is not clear whether this was an acute or chronic infection.

The negative HBsAg means the virus is not currently active, and the absence of Anti-HBs indicates there is no protective antibody level, which contributes to the ambiguity. Therefore, this combination of serological markers indicates that while there has been an infection at some point, the current status isn’t defined clearly enough to categorize it neatly into acute or chronic. Hence, interpreting these serological results as unclear aligns with the characteristics of the specific markers present.